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This guide compares nine running events in Tokyo between November 2026 and March 2027, listed by entry deadline, soonest first. The earliest closes on Friday, October 16, 2026 (Adachi Friendly Half Marathon, Adachi Ward). Next come Sunday, October 25 (BLUE RIVER MARATHON, Katsushika Ward) and Saturday, October 31 (Tokyo New Year Half Marathon, Kita Ward).
All nine were taking entries when their pages were checked on October 14, 2026, except the half marathon of the Tokyo New Year Half Marathon, which is full. On the Japanese entry pages, fees run from ¥1,000 for the children’s 1 km and 3 km runs in Itabashi to ¥13,500 for the Tokyo Challenge Marathon. This is not a list of every race in Tokyo. It covers events whose organizer page or entry page gave dates and fees.
In short
- Nine events, from Saturday, November 14, 2026 to Sunday, March 21, 2027. Entry deadlines run from Friday, October 16 to Thursday, December 10, 2026.
- Entry goes through RUNNET, e-moshicom or Sports Entry. The entry pages are in Japanese. Two events, the Tokyo New Year Half Marathon and the Itabashi City Marathon, also have an English entry route on Run Japan. The organizers’ English pages list higher fees for it, and bibs are collected at the venue instead of mailed (sections 3.3 and 3.8).
- Courses with a set number of places can close before the deadline. The half marathon of the Tokyo New Year Half Marathon is already full.
- Two organizers (BLUE RIVER MARATHON and Tokyo Akabane Marathon) say their event is run in Japanese only. The Frostbite Road Race on Yokota Air Base asks people who are not Japanese or American nationals to write to the organizer before entering.
- Most venues have no parking. Walk from the nearest station, or check the parking notes in section 2.1.
Checked with organizer and entry pages on October 14, 2026 (Japan time).
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1. The nine events in one table
Depends on the organizer
Tap an event name to jump to its section. The fees are for adult entries in the main courses. Fees for students and children are in each section.
| Event | Date and place | Courses and fee | Entry deadline |
|---|---|---|---|
| Adachi Friendly Half Marathon | Dec 20 (Sun) · Adachi Ward | Half ¥7,000, 10 km ¥6,000, 5 km ¥5,000 | Oct 16 (Fri) |
| BLUE RIVER MARATHON | Nov 28 (Sat) · Katsushika Ward | Half ¥3,190, 10.5 km ¥2,690, 5.3 km ¥2,190 | Oct 25 (Sun) |
| Tokyo New Year Half Marathon | Jan 10, 2027 (Sun) · Kita Ward | 10 km ¥5,500, 2 km pair run ¥3,000 (half is full) | Oct 31 (Sat) |
| Tokyo Akabane Marathon | Nov 14 (Sat) · Kita Ward | Half ¥3,190, 31.6 km ¥3,690, 10.5 km ¥2,690 | Nov 1 (Sun) |
| Frostbite Road Race | Jan 17, 2027 (Sun) · Fussa City (Yokota Air Base) | Half ¥9,000, 5 km ¥6,000 | Nov 12 (Thu) |
| Tokyo Akabane Half Marathon | Jan 17, 2027 (Sun) · Kita Ward | Half ¥6,200, 10 km ¥5,000, 3 km ¥3,800 | Nov 23 (Mon, holiday) |
| Tokyo Challenge Marathon | Jan 24, 2027 (Sun) · Adachi Ward | Full ¥13,500, half ¥8,800 | Nov 30 (Mon) |
| Itabashi City Marathon | Mar 21, 2027 (Sun, holiday) · Itabashi Ward | Full ¥11,550, 5 km ¥3,000 | Dec 4 (Fri) |
| Marathon Festival at Showa Kinen Park (Winter) | Dec 27 (Sun) · Tachikawa City | 30 km ¥5,800, half ¥5,400, 10 km ¥4,800 | Dec 10 (Thu) |
2. What to know before you choose
Depends on the organizer
2.1 Getting there and parking
Six of the nine events are held on the Arakawa riverbed, in Adachi, Kita and Itabashi wards. The walk from the nearest station is about 7 minutes for the Tokyo New Year Half Marathon and the Tokyo Akabane Half Marathon (from Akabane-Iwabuchi Station), about 10 minutes for the Tokyo Akabane Marathon (from Akabane-Iwabuchi Station), and about 15 minutes for BLUE RIVER MARATHON, the Tokyo Challenge Marathon and the Itabashi City Marathon.
If you plan to drive, read each organizer’s note first. The Tokyo Akabane Half Marathon, the Tokyo New Year Half Marathon, the Tokyo Challenge Marathon, the Itabashi City Marathon and BLUE RIVER MARATHON say there is no parking at or near the venue. The Itabashi City Marathon’s rules also say you cannot arrive by car or park nearby, including when dropping someone off. The Tokyo Akabane Marathon points to a public riverside car park at ¥500 per day and says it takes no responsibility if the lot is full. Showa Kinen Park has three car parks (2,531 spaces in total, ¥900 per standard car per day), and the car park nearest the venue fills early.
2.2 How to enter
- Pick a race and a course. Use the table above. Each section below lists the courses, the fees and the entry site.
- Register on the entry site. RUNNET needs a free membership (会員登録). The pages are in Japanese. The Tokyo New Year Half Marathon and the Itabashi City Marathon also have English entry pages (see sections 3.3 and 3.8).
- Pay the fee. The payment methods are shown on each entry page. The Tokyo New Year Half Marathon’s RUNNET page lists credit card, convenience store and Pay-easy ATM payment, and e-moshicom lists credit card, Amazon Pay and convenience store payment. For the Tokyo New Year Half Marathon and the Itabashi City Marathon, RUNNET adds a handling fee of ¥240 up to ¥4,000, and 6.0% above that.
- Keep the deadline in mind. Where a course has a set number of places, entry can close before the date.
Six events have no check-in on the day when you enter through the Japanese pages: the bib number (ナンバーカード or アスリートビブス) and timing chip are mailed in advance for the Adachi Friendly, Tokyo New Year, Frostbite, Tokyo Akabane Half, Tokyo Challenge and Itabashi races, so enter an address where you can receive mail. BLUE RIVER MARATHON, the Tokyo Akabane Marathon and the Showa Kinen Park race hand out the bib at check-in on the day.
2.3 Language and ID
The Frostbite Road Race is the only event in this guide that asks you to show government photo ID at the gate. It is held inside Yokota Air Base, and the organizer’s RUNNET page says that anyone who is not a Japanese or US national must contact the organizer by email before entering. The Tokyo Akabane Half Marathon asks you to bring your health insurance card (健康保険証 or 資格確認書) or a copy on race day.
BLUE RIVER MARATHON and the Tokyo Akabane Marathon both answer the question “How do I enter if I live overseas?” the same way on their FAQ pages: ask the entry site, and note that the event is run in Japanese only. Two events have English entry pages on Run Japan (an English entry site): the Tokyo New Year Half Marathon and the Itabashi City Marathon. Both organizers also have an English page on their own sites. For the other events, this guide did not find an English page. Run Japan’s list of Tokyo races open for entry showed only those two of the nine events on October 14, 2026.
The Tokyo Akabane Half Marathon’s own site warns that other Akabane events, including the Tokyo Akabane Marathon, are run by different organizers. Check the event name and date when you enter.
3. The nine events, section by section
Depends on the organizer
Dates, fees and times below come from each organizer’s page, or from the organizer’s RUNNET or e-moshicom page. Check the page again before you enter, because details can change.
3.1 Adachi Friendly Half Marathon: Adachi Ward, December 20
This is the 15th edition, held on the Arakawa riverbed (left bank) around Takasago Baseball Ground. The courses are the half marathon (2,500 places), 10 km (1,000), 5 km, 3 km and 2 km (200 each) and a parent-and-child 1 km (100 pairs). Entry is on RUNNET. The organizer’s outline says entry closes on Friday, October 16, 2026, so enter by that date. The RUNNET page shows a later date, Monday, October 19 at 23:59.
The half marathon is ¥7,000 and the 10 km is ¥6,000; both include a ¥100 donation. The 5 km, 3 km and 2 km are ¥5,000 for adults, ¥3,500 for high school students and ¥2,500 for elementary and junior high school students. The parent-and-child 1 km is ¥3,500 per pair. The half marathon and 10 km are for people who have finished junior high school (15 and over), with time limits of 3 hours and 2 hours. The organizer’s outline says runners of any nationality can enter. You cannot change your course or cancel after entering.
There is no check-in for runners. The organizer plans to mail bibs and chips on Monday, December 7, and asks you to contact the office if they have not arrived by Sunday, December 13. The half marathon starts at 11:00, and the opening ceremony is at 10:00. RUNNET’s transfer service Yuzurel is listed until Wednesday, October 21 at 23:59. Adachi Friendly Half Marathon official outline (Japanese) / RUNNET page for the Adachi Friendly Half Marathon (Japanese)
Venue: Takasago Baseball Ground, 1-14 Adachi, Adachi Ward, Tokyo (Arakawa riverbed, left bank). Google Maps
↑ Back to the comparison table
3.2 BLUE RIVER MARATHON 2026 in TOKYO: Katsushika Ward, November 28
The start, finish and check-in are all at a special venue in Horikiri Waterside Park. It is about a 15-minute walk from Horikiri-shobuen Station on the Keisei Line, and the venue has no parking or bicycle parking. There are 1,000 places. Entry closes on Sunday, October 25, 2026 at 23:59 on RUNNET and on Sports Entry.
Without the finisher T-shirt, the half marathon (21.0975 km) is ¥3,190, the 10.5 km is ¥2,690 and the 5.3 km is ¥2,190. With the T-shirt they are ¥4,290, ¥3,790 and ¥3,290. The half relay (four legs of 5.3 km, teams of 2 to 4) is ¥6,200 for 2 people, ¥8,100 for 3 and ¥8,400 for 4 (with T-shirts: ¥8,400, ¥11,400 and ¥12,800). The 1 km pair run is ¥1,990 (¥4,190 with T-shirts). You choose T-shirt or no T-shirt when you enter and cannot change it afterwards.
The organizer’s FAQ says there is no age limit for any course and that the event is run in Japanese only. Entries cannot be changed or cancelled. Check-in is from 9:00 to 10:45, and the half marathon starts at 11:00. Part of the fee (about ¥100 per entry in past years) goes to the NPO Arakawa Clean-Aid Forum. RUNNET page for BLUE RIVER MARATHON (Japanese)
Venue: Horikiri Waterside Park special venue, 1-chome Horikiri, Katsushika Ward, Tokyo 124-0006. Google Maps
| Name | BLUE RIVER MARATHON 2026 in TOKYO |
|---|---|
| Address | 1-chome Horikiri, Katsushika Ward, Tokyo (Horikiri Waterside Park special venue) |
| Hours / Closed | Saturday, November 28, 2026 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
3.3 Tokyo New Year Half Marathon 2027: Kita Ward, January 10, 2027
The start and finish are at Shin-Arakawa Ohashi Baseball Field on the Arakawa riverbed. It is a 7-minute walk from Akabane-Iwabuchi Station on the Tokyo Metro Namboku Line, or 15 minutes from JR Akabane Station, and there is no parking near the venue on the day. The half marathon is full. The 10 km and the 2 km pair run are still open until Saturday, October 31, 2026 on RUNNET.
The 10 km is ¥5,500 (¥4,000 for high school students) and the 2 km pair run is ¥3,000 per pair. The 10 km is for high school students and over, and anyone under 18 needs a guardian’s consent. The half marathon, now closed, was ¥7,600 for 6,000 places. The 10 km starts at 13:00 and the pair run at 14:50. Bibs and chips are mailed from early to mid December, and there is no check-in on the day.
This event’s own site links two English entry sites, Run Japan and JTB Sports Station, which it describes as entry sites for foreign applicants. Its English outline lists higher fees for that route: ¥8,600 for the half marathon, ¥6,500 for the 10 km (¥5,000 for high school students) and ¥4,000 for the pair run. Run Japan and JTB Sports Station show the same amounts. If you enter through Run Japan, JTB Sports Station or AsiaYo, your bib is not mailed. You must check in on the day before the race. Run Japan gives this check-in as Saturday, January 9, 10:00 to 17:00, at the venue, with no check-in on race day. Tokyo New Year Half Marathon English outline / Tokyo New Year Half Marathon outline (Japanese) / Tokyo New Year Half Marathon entry page (Japanese)
Venue: Shin-Arakawa Ohashi Baseball Field, Arakawa riverbed, Kita Ward, Tokyo. Google Maps
| Name | Tokyo New Year Half Marathon 2027 |
|---|---|
| Address | Kita Ward, Tokyo (Arakawa riverbed, Shin-Arakawa Ohashi Baseball Field) |
| Hours / Closed | Sunday, January 10, 2027 · 10 km start 13:00, 2 km pair run start 14:50 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
3.4 Tokyo Akabane Marathon: Kita Ward, November 14
This event is run by Akabane Base on a 10.5 km loop on the Akabane riverbed, with the special venue under the JR Keihin-Tohoku Line viaduct. It is about 20 minutes on foot from JR Akabane Station and about 10 minutes from Akabane-Iwabuchi Station. Entry closes on Sunday, November 1, 2026 at 23:59 on e-moshicom. Sports Entry, the other entry site, shows Monday, November 2.
Without the original towel, the 31.6 km (for runners who can keep 6 minutes per km or faster) is ¥3,690, the half marathon ¥3,190, the 10.5 km ¥2,690 and the 5.3 km ¥2,190. With the towel, each individual course costs ¥300 more. The half relay (four legs, teams of 2 to 4) is ¥6,200, ¥8,100 and ¥8,400, or ¥6,800, ¥9,000 and ¥9,600 with towels. You choose the towel when you enter and cannot change it afterwards.
The organizer’s FAQ says there is no age limit and that the event is run in Japanese only. Entries cannot be cancelled. Check-in starts at 9:30 and the half marathon starts at 11:00. The public riverside car park costs ¥500 per day. Tokyo Akabane Marathon official outline (Japanese) / Tokyo Akabane Marathon e-moshicom entry page (Japanese)
Venue: under the JR Keihin-Tohoku Line viaduct on the Akabane riverbed, near 3-29-22 Akabane, Kita Ward, Tokyo 115-0045. Google Maps
| Name | Tokyo Akabane Marathon |
|---|---|
| Address | Near 3-29-22 Akabane, Kita Ward, Tokyo (Akabane riverbed, special venue near the JR Keihin-Tohoku Line viaduct) |
| Hours / Closed | Saturday, November 14, 2026 · Reception from 9:30, half marathon start 11:00 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
3.5 The 46th Frostbite Road Race: Fussa City, January 17, 2027
This race starts and finishes inside Yokota Air Base. The organizer is the Yokota Striders Running Club. The organizer’s RUNNET page describes it as a race with an American atmosphere. Entry closes on Thursday, November 12, 2026 at 23:59 on RUNNET. This guide did not find a separate official website.
The fees and places are: half marathon ¥9,000 (6,500 places, ages 16 and over), 5 km ¥6,000 (3,000 places, junior high school and over), kids’ 2 km ¥4,000 (200 places) and family 2 km ¥8,000 per pair (350 pairs, one adult aged 18 or over with a child aged 3 to elementary school). The half marathon has a 3-hour time limit. The participation prize is a sweatshirt (two for a family entry), handed over on the day.
Important
Everyone aged 13 and over must show one of three photo IDs at the entrance: a valid passport, a valid driver’s license or a My Number card. The page says health insurance documents, disability certificates and company ID cards are not accepted, and a residence card is not on the list. If you are refused entry, you get the participation prize but no refund. People who are not Japanese or US nationals must contact the organizer by email before they enter.
Each runner may bring one companion, who also needs photo ID and enters with the runner. Children aged 12 and under do not count toward that limit and need no ID. The opening ceremony is at 8:30, the half marathon starts at 11:00, and entry to the base closes at 10:30. There is no check-in for runners, and bibs are mailed in early January. RUNNET page for the Frostbite Road Race (Japanese)
Venue: inside Yokota Air Base, Fussa City, Tokyo. The organizer’s page gives no street address or access directions. Google Maps
| Name | The 46th Frostbite Road Race |
|---|---|
| Address | Fussa City, Tokyo (inside Yokota Air Base) |
| Hours / Closed | Sunday, January 17, 2027 · Opening ceremony 8:30, half marathon start 11:00 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
3.6 The 18th Tokyo Akabane Half Marathon: Kita Ward, January 17, 2027
The start and finish are at Shin-Arakawa Ohashi Ward Baseball Field. It is about 7 minutes on foot from exit 3 of Akabane-Iwabuchi Station and about 15 minutes from Akabane Station, and there is no parking near the venue. Entry closes on Monday, November 23, 2026 at 23:59, or earlier if the places run out. Entries are first come, first served by payment date.
The half marathon is ¥6,200 (¥5,700 for university men registered with the athletics federation), the 10 km is ¥5,000 (¥3,800 for high school students), the 3 km is ¥3,800 (¥3,300 for high school students and ¥2,700 for junior high school students), the 2 km is ¥2,500 and the parent-and-child 2 km is ¥4,000. The half marathon and the general 10 km are for people aged 18 and over, with a 3-hour limit for the half and 70 minutes for the 10 km. The 10 km starts at 9:20 and the half marathon at 10:50.
You cannot change your course or cancel after entering. Bring your health insurance card (健康保険証 or 資格確認書) or a copy on race day. There is no check-in, and bibs are mailed about 10 days before the race. Tokyo Akabane Half Marathon official outline (Japanese) / Tokyo Akabane Half Marathon entry page (Japanese)
Venue: Shin-Arakawa Ohashi Ward Baseball Field, Kita Ward, Tokyo. Google Maps
| Name | The 18th Tokyo Akabane Half Marathon |
|---|---|
| Address | Kita Ward, Tokyo (Shin-Arakawa Ohashi Ward Baseball Field) |
| Hours / Closed | Sunday, January 17, 2027 · 10 km start 9:20, half marathon start 10:50 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
3.7 Tokyo Challenge Marathon 2027: Adachi Ward, January 24, 2027
The course is a 10 km loop on the Arakawa riverbed that starts and finishes at Niji-no-Hiroba, with the full marathon and the half marathon run together. The organizer says it has applied to have the course certified by the Japan Association of Athletics Federations (JAAF) for the 2027 race. The nearest station is Kita-Senju, about 15 minutes on foot, and there is no parking. Entry closes on Monday, November 30, 2026 at 23:59, online only.
The full marathon is ¥13,500 (2,500 places, ages 18 and over, 4 hours 30 minutes) and the half marathon is ¥8,800 (1,000 places, high school students and over, 2 hours 30 minutes). Anyone under 18 needs a guardian’s consent. There are two start times, 10:00 and 10:10, assigned from the finish time you declare. Course changes, cancellations and refunds are not possible after entry. Bibs are mailed, planned for January 14, so there is no check-in. Entry by “hometown tax” donation (ふるさと納税) is also offered through Rakuten Furusato Nozei and Furusato Choice, first come, first served. Tokyo Challenge Marathon official outline (Japanese) / Tokyo Challenge Marathon entry page (Japanese)
Photo source: Adachi Ward press release on the Tokyo Challenge Marathon, PR TIMES, July 23, 2026 (Japanese)
Venue: Niji-no-Hiroba, 5-chome Senju, Adachi Ward, Tokyo. Google Maps
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| Name | Tokyo Challenge Marathon 2027 |
|---|---|
| Address | 5-chome Senju, Adachi Ward, Tokyo (Niji-no-Hiroba) |
| Hours / Closed | Sunday, January 24, 2027 · Start 10:00 · 10:10 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
3.8 Itabashi City Marathon 2027: Itabashi Ward, March 21, 2027
The start and finish are at a special venue on the Arakawa riverbed, upstream of Toda Bridge on National Route 17. The full marathon has 10,000 places and a 7-hour time limit. The runner must be 19 or older on race day. Entry closes on Friday, December 4, 2026 at 23:59 on RUNNET, first come, first served.
On the Japanese entry pages, the full marathon is ¥11,550 for the ward-resident and general quotas. The Premium Entry Plan (60 places, with a dedicated tent and other facilities) is ¥33,000. The 5 km is ¥3,000 (¥2,000 for high school students), the junior 3 km for junior high school students is ¥1,000, and the family run (1 km, up to 5 people) is ¥1,000. The wheelchair 1 km is free and is entered through the organizer’s office. RUNNET adds a handling fee of ¥240 up to ¥4,000 and 6.0% above that. The full marathon starts at 9:00.
The nearest stations are Ukima-Funado Station (JR Saikyo Line) and Hasune Station (Toei Mita Line), both about 15 minutes on foot, or 5 minutes from the Funado Elementary School bus stop (Kokusai Kogyo Bus). The organizer asks you not to come by car. On the Japanese entry route there is no check-in, and the bib, chip and other items are planned to be mailed in early March. People who live outside Itabashi Ward can also enter through a “hometown tax” donation of ¥43,000 or more, with a separate deadline for each donation site (November 14 to November 25).
The organizer’s English guidance page lists the general quota for the full marathon at ¥15,550, entered through Run Japan. That is ¥4,000 more than the ¥11,550 on the Japanese pages, where the general quota is entered through RUNNET. The ¥11,550 fee on the English page is for the ward-resident quota. On the English route, bibs and chips are picked up at the venue on race day. Run Japan gives this check-in as Sunday, March 21, from 7:00 to 8:00 near Toda Bridge. The 5 km, 3 km and 1 km fees are the same on both routes. Itabashi City Marathon English guidance page / Run Japan entry page for the Itabashi City Marathon / Itabashi City Marathon guidelines (Japanese) / Itabashi City Marathon entry page (Japanese)
Photo source: Itabashi Ward press release on the Itabashi City Marathon, PR TIMES, September 1, 2026 (Japanese)
Venue: special venue on the Arakawa riverbed, upstream of Toda Bridge on Route 17, Itabashi Ward, Tokyo. Google Maps
| Name | Itabashi City Marathon 2027 |
|---|---|
| Address | Itabashi Ward, Tokyo (special venue on the Arakawa riverbed, upstream of Toda Bridge on National Route 17) |
| Hours / Closed | Sunday, March 21, 2027 (public holiday) · Marathon start 9:00 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
3.9 Marathon Festival at Showa Kinen Park, Winter: Tachikawa City, December 27
The race is held on a 5 km loop in Showa Kinen Park. The 30 km, half marathon and 10 km courses are JAAF-certified. The venue is the Undo Hiroba. From JR Nishi-Tachikawa Station, the Nishi-Tachikawa gate of the park is the most convenient entrance. Entry closes on Thursday, December 10, 2026 at 23:59 on RUNNET, Sports Entry or Lawson Ticket.
The fees include the ¥450 park admission: 30 km ¥5,800, half marathon ¥5,400, 10 km ¥4,800, 5 km ¥4,200 and the parent-and-child 1 km ¥3,800 per pair. There are 2,100 places in total, and entry ends when they are full. After entering, you cannot change your course, cancel, transfer your place or change the name. Check-in is at the Undo Hiroba from 9:30, and the half marathon starts at 11:00. If you drive, use the park’s car parks (¥900 per standard car per day); the one nearest the venue fills early. Marathon Festival at Showa Kinen Park entry page (Japanese) / Marathon Festival at Showa Kinen Park access page (Japanese)
Venue: Undo Hiroba, Showa Kinen Park, 3173 Midoricho, Tachikawa City, Tokyo. Google Maps
| Name | Marathon Festival at Showa Kinen Park, Winter |
|---|---|
| Address | 3173 Midoricho, Tachikawa City, Tokyo (Showa Kinen Park, Undo Hiroba) |
| Hours / Closed | Sunday, December 27, 2026 |
| Map | Open in Google Maps ↗ |
| Official site | Open the official site ↗ |
↑ Back to the comparison table
4. How to choose
Depends on the organizer
If this is your first race, look for an event that offers a short course. Adachi Friendly starts at 2 km, Itabashi at 1 km and Showa Kinen Park at 5 km. BLUE RIVER MARATHON and the Tokyo Akabane Marathon both charge ¥2,190 for their 5.3 km course.
For the full marathon, the choices are the Tokyo Challenge Marathon (¥13,500, January) and the Itabashi City Marathon (¥11,550, March). If you want to run with friends or colleagues, BLUE RIVER MARATHON and the Tokyo Akabane Marathon have four-leg half relays for teams of 2 to 4. Both charge more if you choose the participation prize (a T-shirt or a towel).
If you want to enter in English, the Tokyo New Year Half Marathon and the Itabashi City Marathon have an English entry route. The organizers’ English pages list higher fees for it, and you collect your bib at the venue (the day before in Kita Ward, on race day in Itabashi). For the Frostbite Road Race, write to the organizer first if you are not a Japanese or US national.
Common questions
Can entry close before the deadline?
Yes. The pages say entry ends when the places are full. The half marathon of the Tokyo New Year Half Marathon closed on August 13 because it was full.
Is there an English entry page?
For two of the nine events, yes. The Tokyo New Year Half Marathon links Run Japan and JTB Sports Station, and the Itabashi City Marathon has an English guidance page and a Run Japan entry page. The organizers’ English pages list higher fees for the English route, and the bib is collected at the venue instead of mailed. BLUE RIVER MARATHON and the Tokyo Akabane Marathon say they are run in Japanese only. For the rest, this guide did not find an English entry page.
Can I change my course or cancel after I enter?
Several organizers say no. The Adachi Friendly Half Marathon, the Tokyo Challenge Marathon, the Tokyo Akabane Half Marathon, BLUE RIVER MARATHON, the Tokyo Akabane Marathon, the Itabashi City Marathon (its English guidance page) and the Showa Kinen Park race all say you cannot change courses or cancel after entry. For the other events, read the rules on the entry page before you pay.
What if I cannot run after I enter?
For some RUNNET events, RUNNET’s transfer service Yuzurel lets another runner take your place. It starts after the entry deadline or when the places are full. The RUNNET pages list it for the Adachi Friendly Half Marathon (until October 21), the Tokyo New Year Half Marathon (until November 2), the Frostbite Road Race (until November 14), the Tokyo Akabane Half Marathon (until November 25), the Tokyo Challenge Marathon (until December 2) and the Itabashi City Marathon (until December 6).
Sources (checked October 2026)
13 pages we checked
- RUNNET: race search for Tokyo (Japanese), used to find races and compare deadlines
- Adachi Friendly Half Marathon: official site, official outline (Japanese); RUNNET page
- BLUE RIVER MARATHON: official site; RUNNET page; Sports Entry page (Japanese)
- Tokyo New Year Half Marathon: English outline, outline, entry, access; RUNNET page (Japanese); English entry sites: Run Japan, JTB Sports Station
- Tokyo Akabane Marathon: outline, FAQ; e-moshicom page; Sports Entry page (Japanese)
- Frostbite Road Race: RUNNET page (Japanese; the organizer’s page, no separate website found)
- Tokyo Akabane Half Marathon: outline, entry, course and access; RUNNET page (Japanese)
- Tokyo Challenge Marathon: outline, entry, access; RUNNET page (Japanese)
- Itabashi City Marathon: guidelines, entry, access; RUNNET page (Japanese); English: guidance page, Run Japan page
- Run Japan: Tokyo race list (English), used to see which of the nine events have English entry pages
- Marathon Festival at Showa Kinen Park: event page, entry, access; Showa Kinen Park access page (park address); RUNNET page (Japanese)
- Photos: press releases of Itabashi Ward (September 1, 2026) and Adachi Ward (July 23, 2026) on PR TIMES
- Embedded videos and posts: official YouTube channels of the Tokyo New Year Half Marathon and the Tokyo Akabane Half Marathon; official Instagram accounts of the Adachi Friendly Half Marathon, YAAAS RUN (BLUE RIVER MARATHON), the Tokyo Akabane Marathon and the Tokyo Challenge Marathon; the official X account of the Itabashi City Marathon; two unofficial YouTube videos (原田拓のマラソン学習チャンネル and マツトラちゃんねる)
Dates, fees and reception times can change. Check the organizer’s page before you enter.
