How Tokyo coin laundries work: detergent, dryers, payment

Bringing your own detergent to a Japanese coin laundry is usually the wrong move, because the machine doses its own and adding more can work against it. The dryer is the other surprise: it is not sold by the load, it is sold by the minute, and you buy minutes in JPY 100 units until your clothes are dry.

Those two facts account for most of the confusion foreigners have in a コインランドリー. The rest is a licensing layer you can see on the wall — the official-looking notice next to the machines is there because Japan regulates these premises, and a 2022 rule change is the reason nobody is behind a counter.

This guide covers street coin laundries in Tokyo run by the national chains. It does not cover commercial dry cleaners, pickup-and-delivery services, or the machines inside a specific hotel, which are that hotel's own equipment on that hotel's own terms.

Do you bring your own detergent?

No — at the four largest chains the machine doses detergent for you, and one of them explicitly tells you not to add any. Mammaciao's usage guide states flatly that "洗剤は自動投入されます", detergent is automatically dispensed (マンマチャオ 使い方ガイド, checked 15 September 2026). WASH House states "洗剤・柔軟剤は自動投入です", detergent and softener are automatically dispensed (ＷＡＳＨハウス 洗濯乾燥機の使い方, checked 15 September 2026).

Baluko Laundry Place goes further and gives the reason. Its Q&A says "洗剤、柔軟剤は不要です。自動投入されます" — detergent and softener are unnecessary, they are dispensed automatically — and adds that water volume is calibrated to the preset detergent dose, so pouring in your own can reduce cleaning performance and damage the machine (Baluko Q&A, checked 15 September 2026). Coin Laundry Pierrot describes its own dispensed product as a commercial neutral detergent supplied at no extra charge (ピエロ よくあるご質問, checked 15 September 2026).

There is one honest exception, and it comes from a chain's own mouth rather than from a forum. Mammaciao's FAQ says some of its branches do require customers to bring detergent and softener themselves (マンマチャオ よくあるご質問, checked 15 September 2026). So the rule for a traveller is: assume nothing is needed, then read the notice on the machine before you pay. If the panel or the wall says nothing about 洗剤, it is dosing for you.

How is the dryer priced?

Drying is sold as time, so the price you see is a number of minutes per JPY 100 rather than a flat charge for one load. Mammaciao describes its dryers as a 100円単位の時間制, a time-based system in JPY 100 units, at roughly 8 to 10 minutes per JPY 100, and separately gives "100円で約9分" as its network figure (マンマチャオ 料金相場 and 店舗検索ページ, both checked 15 September 2026). The first of those pages states its own basis: a July 2026 survey of 533 of the chain's 538 stores covering 4,784 published prices.

The exact rate is a property of the individual machine, not of the country. WASH House's Omuta Kamicho branch publishes JPY 100 for 10 minutes on its 14 kg dryers and JPY 100 for 7 minutes on its 25 kg dryers (ＷＡＳＨハウス 大牟田上町店, checked 15 September 2026). Mammaciao's Akihabara branch in Tokyo publishes JPY 100 for 12 minutes on its 14 kg dryers (マンマチャオ秋葉原店, checked 15 September 2026). Bigger drum, fewer minutes per coin.

The practical consequence is that you cannot know your drying bill in advance, only your drying rate. A load that came out of a good spin needs far fewer coins than a duvet. Buy time in small increments and feel the clothes rather than paying for forty minutes up front, because unused minutes are not refunded.

Which machine does what?

A Japanese coin laundry usually holds four or five distinct machine types, and each is priced on its own logic. The table below decodes them: what the machine is for, how its price is structured, and roughly how long it runs. Every figure is attributed to the chain page that published it.

Capacity claims for the sneaker machine are consistent across two chains: WASH House says two adult pairs or four children's pairs per load, and Baluko says the same (ＷＡＳＨハウス よくあるご質問 and Baluko Self Laundry, both checked 15 September 2026). Neither chain puts shoes in with clothes, and neither should you.

One Tokyo branch is worth reading as a concrete example rather than an average. Mammaciao Akihabara, at 5-1-7 Sotokanda in Chiyoda, publishes 9 kg washers at JPY 500 (JPY 600 for a heavy course), a 15 kg wash-and-dry at JPY 1,400 (JPY 1,600 heavy), a 27 kg wash-only at JPY 1,000 (JPY 1,200 heavy), and 14 kg dryers at JPY 100 for 12 minutes, open 24 hours and accepting cash, QR code payment, IC cards and prepaid cards (マンマチャオ秋葉原店, checked 15 September 2026). That is one shop's price list, not Tokyo's.

What do you actually do?

The sequence is short, and almost every step has a specific way visitors get it wrong. The table below pairs each action with the mistake that action attracts.

Step 4 deserves an extra line because it is where the chains diverge most. Baluko's Q&A lists credit cards (VISA, MasterCard, JCB) and PayPay through its app (Baluko Q&A); Pierrot describes a multi-terminal taking coins and JPY 1,000 notes plus IC cards, with a 5 percent discount for app code payment (ピエロ FAQ); WASH House offers a cashless app while confirming that coin top-ups still work mid-cycle (ＷＡＳＨハウス). All three checked 15 September 2026. Coins are the only method that works everywhere.

Timing, too, is chain-published rather than universal. Pierrot tells customers to budget roughly 30 minutes each for washing and drying, with 20 to 30 minutes extra for bulky items such as a down duvet (ピエロ FAQ, checked 15 September 2026). Baluko lists wash-and-dry combos at about 60 minutes, a standalone 10 kg washer at about 40 minutes, and dryers at 30 to 50 minutes depending on the load (Baluko Self Laundry, checked 15 September 2026).

What varies between operators?

Almost every number in this article is set by the individual store, and the chains say so themselves. Mammaciao's own store-finder page carries the disclaimer that "料金・機器構成・コースは店舗により異なりますので目安としてご利用ください" — prices, equipment mix and courses differ by store, so treat the figures as a guide — and tells readers to confirm exact amounts on each branch page (マンマチャオ, checked 15 September 2026). Its futon guide repeats the same caution (布団丸洗いガイド, checked 15 September 2026). What is genuinely standardised is small: the existence of auto-dosing at the big chains, time-based dryer pricing, and the posted-notice requirement that comes from national guidance.

What is not standard is longer. There is no national price list and no regulated tariff, so the JPY 400 small wash and the roughly JPY 100 per 9 minutes drying rate that Mammaciao measured across its own 533 stores are that chain's figures, not Japan's. There is no guaranteed cashless payment; Baluko's Self Laundry page describes coin payment as the baseline and says that only some locations have centralised terminals, apps or rechargeable cards. There is no guaranteed futon course or sneaker washer — Baluko states that futon-specialist equipment is available at select locations only, and Mammaciao's survey found shoe machines at some stores rather than all. There is no guaranteed English on the panel, and no rule requiring it. And there is no guaranteed detergent dosing, because Mammaciao's own FAQ concedes that some of its stores expect you to bring your own.

Hotel coin laundries sit outside all of this, and we could not find a chain or hotel-group page that documents how they differ, so this guide makes no claim about them. Treat a hotel's machines as that property's equipment: check its posted instructions, expect it to want JPY 100 coins, and do not assume detergent is included the way it is at a Baluko or a WASH House.

What do the wall notices require?

The wall notices are official because coin laundries are a regulated category of premises with national hygiene guidance behind them. Japan's Ministry of Health, Labour and Welfare issued the コインオペレーションクリーニング営業施設の衛生措置等指導要綱, the guidance on hygiene measures for coin-operated cleaning business premises, as notice 環指第39号 on 29 March 1983 (厚生労働省, checked 15 September 2026). It is why the sign next to the machines has the tone of a health inspection rather than a shop poster.

The guidance sets out what has to be displayed where customers can see it: the name and contact details of the designated hygiene manager (衛生管理責任者), instructions for operating the equipment and for handling fabrics, and the rules on what must not be washed. It also imposes operating duties on the business — daily cleaning and disinfection of drum interiors, lids and handles, filter maintenance and replacement, ventilation targets of carbon dioxide at or below 1,000 ppm and carbon monoxide at or below 10 ppm, at least 300 lux of lighting while the premises are in use, and hand-washing facilities with running water (same source, checked 15 September 2026).

The absence of staff is also a regulatory fact rather than a cost-cutting accident. MHLW amended the guidance by notice 生食発第1227008号 on 27 December 2022 to add a proviso allowing the hygiene manager to fulfil the management duty remotely where digital technology makes it possible to act immediately if needed (厚生労働省, checked 15 September 2026). The Japan Coin Laundry Association (一般社団法人 日本コインランドリー連合会) summarised the change for its members on 8 January 2023 as formal recognition of remote hygiene management (日本コインランドリー連合会, checked 15 September 2026). The amendment did not change the posting requirements or the prohibited-items list, which stand as written in 1983.

That is the shape of the store you walk into: unattended by design, supervised from elsewhere, with a phone number on the wall instead of a person. Mammaciao and Pierrot both state on their own sites that their stores are 無人営業 — unstaffed — with call-centre support instead of an attendant (both checked 15 September 2026).

The same guidance names specific categories that must not be washed, and the chains add their own longer lists on top. MHLW's guidance requires operators to post a prohibition covering clothing worn by people with communicable diseases, and nappies, shoes or animal bedding contaminated with faeces (厚生労働省 環指第39号, checked 15 September 2026). That is a public-health rule about what the next customer's laundry will touch, not a machine-protection rule.

The chain lists are about damage. Baluko's Q&A names cotton-filled bedding, wool blankets, leather shoes, beaded or decorated garments, animal-hair rugs and anything labelled as not water-washable (Baluko Q&A). Pierrot's FAQ names pet items, leather goods, delicate embroidered or beaded garments, non-quilted futons, wool and silk, cushions, and items contaminated with oil (ピエロ FAQ). Both checked 15 September 2026. The oil exclusion is the one travellers underestimate: oil-soaked fabric in a hot dryer is a fire risk, not a stain problem.

For bedding, read the care label before the price list. Mammaciao's futon guide says down, polyester blankets and futons and anything marked 水洗い可 can be washed, while wool, urethane or memory foam, and cotton-filled sleeping futons cannot (マンマチャオ 布団丸洗いガイド, checked 15 September 2026). WASH House takes the same line for drying: down and cotton futons can be dried, but not items marked 乾燥機禁止 (ＷＡＳＨハウス よくあるご質問, checked 15 September 2026).

What does this guide not cover?

This guide does not give you a price for a specific Tokyo street, because no such number exists at national level and every chain page we read says so. The figures here are attributed to the exact page that published them — a July 2026 survey of 533 Mammaciao stores, one Tokyo Mammaciao branch, and one WASH House branch in Kyushu — and the honest use of them is as a shape, not a quote. Look up the branch you are standing outside.

We also could not confirm a national count of licensed coin laundry premises from a primary source. The MHLW publishes cleaning-industry figures through 衛生行政報告例 on e-Stat, but we did not find a published table breaking out コインオペレーションクリーニング営業 as its own line, so this guide gives no total and you should treat any figure you see elsewhere with suspicion unless it cites the table it came from.

Three other things are outside scope. Hotel in-house laundries, as above, because no operator documents the comparison. Dry cleaning and pickup services, which are a different licensed activity with different rules. And any claim that a particular chain is cheapest, which we cannot support: the chains publish per-branch pricing, and a comparison across branches is a comparison of the branches, not of the brands.

How should you plan your first load?

Walk in with laundry, a phone and about JPY 1,500 in coins, and expect to spend an hour. Read the posted notice first for the detergent line and the prohibited items, choose a wash-and-dry combo if you would rather not come back twice, and feed drying time in small increments once the wash is done.

If you are on a long stay and will do this weekly, spend the first visit learning the specific store instead of the country. Note whether the machines take anything other than coins, whether the panel has a futon course, what the dryer's minutes-per-JPY-100 rate is on the drum you use, and whether detergent is dosed. Those four answers are what actually change between one coin laundry and the next, and none of them can be looked up for you.