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Many households in Japan do a big clean before the New Year (年末の大掃除, nenmatsu no osoji). In Yamaguchi, the hard jobs are the air conditioner, the range hood (the fan over the stove) and the bathroom, and many people hire a company. This guide compares three companies for those jobs: Duskin Service Master, Osoji Honpo and Kajitaku. It shows official prices, how many shops each has in Yamaguchi Prefecture and in five main cities (Shimonoseki, Yamaguchi, Ube, Shunan, Iwakuni), parking charges and when to book. All prices include tax.
In short
- One wall-mounted air conditioner (no self-cleaning function): ¥14,300 at Osoji Honpo, ¥15,400 at Duskin, and ¥9,700 to ¥11,880 at Kajitaku, depending on the plan.
- Range hood and bathroom: ¥18,700 at Osoji Honpo, ¥19,580 at Kajitaku, and ¥22,000 at Duskin (the base price; larger jobs cost more).
- Duskin has 15 shops in Yamaguchi Prefecture, with none in Shunan City or Iwakuni City. Osoji Honpo has 14, with shops in all five cities above. Kajitaku has no shops and sells at one price across Japan.
- The official pages we read for all three companies are in Japanese and say nothing about English. None gives a year-end booking deadline.
Checked with official pages on October 11, 2026.
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1. What do the three companies charge?
Depends on the company
For one air conditioner, Osoji Honpo lists ¥14,300, Duskin ¥15,400, and Kajitaku ¥9,700 to ¥11,880 on the campaign prices shown on October 11, 2026. The ¥9,700 plan does not take the unit apart; cleaning inside the unit starts at ¥11,880. For a range hood or a bathroom, Osoji Honpo (¥18,700) and Kajitaku (¥19,580) are close, and Duskin starts higher (¥22,000). Click a company name to jump to its section.
| Company | Air conditioner, 1 unit | Range hood / bathroom | Shops in Yamaguchi Pref. |
|---|---|---|---|
| Duskin | ¥15,400 | From ¥22,000 / from ¥22,000 | 15 |
| Osoji Honpo | ¥14,300 (¥12,100 each for 2 or more) | ¥18,700 / ¥18,700 | 14 |
| Kajitaku | ¥9,700 to ¥11,880 (campaign) | ¥19,580 / ¥19,580 | No shops |
These are standard prices for a wall-mounted air conditioner without a self-cleaning function. Units with a self-cleaning function cost more. Kajitaku’s air conditioner prices are campaign prices; its regular prices are ¥10,780 to ¥14,300 (see section 4). Parking: Kajitaku pays for it; Duskin and Osoji Honpo may charge you if there is no space (see sections 2 and 3). The shop counts are for the whole prefecture; section 5 gives them by city.
If you book all three jobs (one air conditioner, one range hood, one bathroom), adding the base prices gives ¥59,400 at Duskin, ¥51,700 at Osoji Honpo and from ¥48,860 at Kajitaku. The Kajitaku figure uses the ¥9,700 plan and excludes other discounts and extra fees.
2. Duskin Service Master: 15 shops in Yamaguchi Prefecture
Depends on the company
Duskin’s standard price for a wall-mounted air conditioner is ¥15,400. Duskin has regional price pages, and the one you get after choosing Yamaguchi in the area menu (its “B area” list) shows ¥15,400 for one unit and ¥25,300 for a set of two. With a self-cleaning function, one unit is ¥26,400. Air conditioner cleaning and price list for Yamaguchi (B area) (Duskin official, Japanese).
A range hood or hooded fan under 95 cm wide is ¥22,000, and each extra 15 cm adds ¥2,530. A bathroom with a floor of 3 m² and a ceiling under 2.4 m is ¥22,000, and each extra 1 m² adds ¥5,060. Duskin says work on weekends, holidays and at night may not be accepted, or may cost extra. If your free days are only on weekends or holidays, ask the shop before you apply. Range hood and bathroom (Duskin official, Japanese).
A campaign runs for water-related jobs (bathroom, washroom and toilet, kitchen, range hood). If you book 2 or more of them, the total for those jobs is 8% off. Applications are open from September 14 to November 6, 2026, and the work must be done by November 13, 2026. A single job does not qualify, and the page says some areas and shops cannot offer it. The same page asks you to prepare a parking space for the service van, and says you pay for a paid car park if the van cannot park. It also says that if the shop has to use a paid ferry or bridge to reach you, the actual cost is billed separately. Water-related cleaning campaign (Duskin official, Japanese)
The Yamaguchi Prefecture shop list shows 15 shops: 4 in Yamaguchi City, 3 in Shimonoseki City, 2 each in Kudamatsu City and Hikari City, and 1 each in Ube City, Hofu City, Yanai City and Suo-Oshima Town (Oshima District). There is no shop in Shunan City or Iwakuni City. The list does not say which shop covers which address, so if you live in one of those two cities, ask Duskin whether it can come. You apply on the Duskin website or by phone, and the shop contacts you later with the estimate and the date. Yamaguchi Prefecture shop list (Duskin official, Japanese)
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3. Osoji Honpo: 14 shops in Yamaguchi Prefecture, ¥2,200 less per unit for 2 or more
Depends on the company
Osoji Honpo’s air conditioner cleaning (wall-mounted, no self-cleaning function) is ¥14,300 for one unit and ¥12,100 per unit when you book 2 or more together. With a self-cleaning function it is ¥24,200, or ¥22,000 per unit for 2 or more. Until November 1, 2026, a limited-time campaign lowers the one-unit price to ¥13,200 (¥11,000 per unit for 2 or more). Full disassembly cleaning is an option at ¥8,800. Air conditioner prices (Osoji Honpo official, Japanese)
Range hood and fan cleaning is ¥18,700 and takes about 2.5 hours. Bathroom cleaning is ¥18,700 and takes about 2 hours. The page says a range hood made 9 years ago or more may be refused, or the work may not be guaranteed, because the maker has stopped making parts. Range hood and bathroom (Osoji Honpo official, Japanese).
The Yamaguchi Prefecture shop list shows 14 shops: 4 in Shimonoseki City, 3 in Iwakuni City, 2 in Shunan City, and 1 each in Ube City, Yamaguchi City (Ogori), Hofu City, Hikari City and Yanai City. The steps are a free estimate request in the website’s estimate cart, a phone call from the shop to set the date, and a final check of time, price and work when the staff arrive. The company says it normally charges only the quoted price, but you may pay a travel fee if you live far away, and a parking fee if there is no parking space. Yamaguchi Prefecture shop list and how an estimate works (Osoji Honpo official, Japanese).
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4. Kajitaku: no shops, the same price in Yamaguchi as everywhere
Depends on the company
Kajitaku, an AEON Group service, sells air conditioner cleaning in three plans for wall-mounted units. The regular prices for a unit without a self-cleaning function are ¥10,780 (Light), ¥14,300 (Standard) and ¥25,300 (Premium). On October 11, 2026 the page showed campaign prices of ¥9,700, ¥11,880 and ¥22,770. Light (30 to 50 minutes) cleans the outer cover, the filter and the surface of the outdoor unit and does not take the unit apart. Standard (60 to 150 minutes) takes the unit apart and also cleans the inside. The page does not give an end date for the campaign, so check the price on the booking screen. Air conditioner plans (Kajitaku official, Japanese)
Range hood and bathroom cleaning each start at ¥19,580, and take about 120 minutes. The company says the price is the same in every area, with no travel fee, and that it does not charge for parking, even in a paid car park. It can visit 3 days after you book at the earliest, and cannot come on the day you ask. You book on the website, or by phone at 0120-525-827 (10:00 to 16:00, except the New Year holiday). The “Year-End Cleaning 2-item Set A” (大掃除2点セットA, bathroom and range hood together) is ¥34,800 for about 240 minutes, which the page says is ¥4,360 less than booking the two separately. House cleaning prices and booking (Kajitaku official, Japanese)
Not every plan is offered in every city. Kajitaku’s service area list marks 9 cities in Yamaguchi Prefecture: Shimonoseki, Ube, Yamaguchi, Hofu, Kudamatsu, Iwakuni, Hikari, Yanai and Shunan. In all 9, the Light and Standard air conditioner plans and the bathroom / range hood group are marked as available. The Premium air conditioner plan is marked as available only in Shimonoseki and Iwakuni. You can check your own address by postal code on the same page. Service area list (Kajitaku official, Japanese)
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5. Which companies can come to your city?
Depends on the company
Where you live decides your options more than the price does: Duskin has no shop in Shunan City or Iwakuni City, and Yamaguchi City has 4 Duskin shops but only 1 Osoji Honpo shop. The table counts shops by city on the official lists of October 11, 2026.
| City | Duskin | Osoji Honpo | Kajitaku air conditioner plans |
|---|---|---|---|
| Shimonoseki | 3 shops | 4 shops | Light, Standard, Premium |
| Yamaguchi | 4 shops | 1 shop | Light, Standard |
| Ube | 1 shop | 1 shop | Light, Standard |
| Shunan | No shop | 2 shops | Light, Standard |
| Iwakuni | No shop | 3 shops | Light, Standard, Premium |
- Shunan City and Iwakuni City: Duskin has no shop in either city. Osoji Honpo has 2 shops in Shunan City and 3 in Iwakuni City, and Kajitaku comes from outside at one price.
- Yamaguchi City: Duskin has 4 shops and Osoji Honpo has 1 (Ogori). If you choose by the number of nearby shops, look at the Duskin list first.
- Island or bridge addresses: Suo-Oshima Town has 1 Duskin shop. Duskin says it bills the actual cost of a paid ferry or bridge separately, so mention your address when you ask for an estimate.
- Parking: the companies visit by car. Kajitaku does not charge for parking. Duskin and Osoji Honpo say you may pay if the van cannot park, so tell them early if your apartment has no space.
- English: the official pages we read for all three companies are in Japanese and do not say whether English is available. Plan to book through the Japanese page or ask a Japanese speaker to help.
6. When should you book for the year-end?
Depends on the company
None of the three official pages gives a deadline for year-end bookings, so if you have a date in mind, ask for a quote or book early. Kajitaku says its cleaners work on weekdays, Saturdays, Sundays and holidays from about 8:00 to 18:00, except during the New Year holiday period, and that a date can be full. Osoji Honpo sets the date by a phone call from the shop, and Duskin by a call from the shop after your application. Two discounts end earlier than the year-end: Osoji Honpo’s air conditioner campaign on November 1, 2026, and Duskin’s water-related 8% off, which you must apply for by November 6, 2026.
The booking and estimate pages are in Japanese. If you use a browser translation tool to read them, check the date, the price and the work again on the final confirmation screen.
7. What should you check before you sign?
National Consumer Affairs Center of Japan
Important
In a notice of February 28, 2025, the National Consumer Affairs Center of Japan told people to get quotes from several companies and to check, before signing, whether insurance covers damage the work might cause. The notice includes a case where a cheap fan cleaning (¥5,000) led to a contract of about ¥600,000 after sales talk. It says you may refuse to sign if you do not accept the price or the explanation. It also advises asking the air conditioner maker about the cleaning method. If something goes wrong, call the consumer hotline 188, which connects you to a local consumer center. The notice does not say whether English is available.
Notice on house cleaning trouble (National Consumer Affairs Center of Japan, Japanese)
In Yamaguchi Prefecture, the Yamaguchi Prefectural Consumer Affairs Center takes consultations by phone or in person. The page lists hours of 8:30 to 17:00, Monday to Friday, and says it is closed on Saturdays, Sundays, holidays and from December 29 to January 3. The page does not say whether English is available. Consultation by phone or in person (Yamaguchi Prefecture official, Japanese)
Address: inside the Yamaguchi Prefectural Government building, 1-1 Takimachi, Yamaguchi City. Google Maps. Phone: 083-924-0999.
8. Can you compare local cleaners yourself?
Depends on the provider
If you would rather compare individual cleaning shops than pick one of the three companies, Your Mystar is a booking site where you can search for cleaners. The site and its forms are in Japanese only, so you may need a browser translation tool or a Japanese speaker.
PR · Ad / affiliate link. Your Mystar is one of several ways to find a cleaner. Its page and forms are in Japanese only.
9. Common questions
Common questions
Do I pay for parking?
Kajitaku says no. Duskin asks you to pay for a paid car park if its van cannot park at your home. Osoji Honpo says a parking fee may be needed if there is no parking space.
Is there a discount for cleaning two air conditioners?
Osoji Honpo lists ¥12,100 per unit for 2 or more (¥14,300 for one). Duskin lists ¥25,300 for a set of two (¥15,400 for one).
Does the price change by area?
Kajitaku says its price is the same in every area. Duskin has regional price lists, and the Yamaguchi list matches its standard prices. Osoji Honpo gives a quote through the shop.
Can I book on the same day?
Not with Kajitaku. It can visit 3 days after you book at the earliest. The pages we read for Duskin and Osoji Honpo do not say.
Next steps
- Write down how many air conditioners, range hoods and bathrooms you want cleaned, and whether you have parking.
- Check the shop lists and the table in section 5 for your city, then open the official estimate or booking page of each company.
- Check the before-you-sign points in section 7, and ask about insurance for damage.
Sources (checked October 2026)
5 pages we checked
- Duskin Service Master (Japanese): air conditioner, price list for Yamaguchi (B area), range hood, bathroom, campaign, Yamaguchi shops
- Osoji Honpo (Japanese): air conditioner, estimate steps, range hood, bathroom, Yamaguchi shops
- Kajitaku (Japanese): air conditioner, house cleaning, service area list
- National Consumer Affairs Center of Japan (Japanese): notice of February 28, 2025
- Yamaguchi Prefecture (Japanese): Consumer Affairs Center consultation
Prices, campaigns and booking rules can change, so check the official page before you book.
