Sento tattoo rules Japan: what the Public Bath Act says, sento vs onsen, and what unconfirmed means
No Japanese law bans tattooed people from public baths. The Public Bath Act of 1948 does not contain the word tattoo, so every ban you meet is a house rule. This guide separates the legal frame from the cultural one, explains what sento and onsen share and where they differ, quotes the national tourism body's position, and shows why a facility that says nothing is labelled "unconfirmed" in our app rather than "OK".
The short answer
- The Public Bath Act (公衆浴場法) has 5 core articles on permits, hygiene, refusing infectious disease and bather conduct. Opened on e-Gov on 2026-09-12: 入れ墨 and タトゥー appear 0 times.
- Sento and onsen day-use baths are both "public baths" under that act. The difference is pricing category and culture, not tattoo law. Tokyo's regulated sento price is ¥600 for adults from 2026-08-01.
- JNTO's own site says a tattoo will not prevent you from experiencing an onsen or sento, and advises covering, private baths and asking ahead.
- 112 facilities in our verified list have a published policy: 91 tattoo-OK and 21 cover-required. Everything else on the map is "unconfirmed", because silence is not permission.
This article reports what primary sources say and does not give legal advice. Prefectural ordinances made under the act were not opened for this article; where we could not read a document, we say so.
What the Public Bath Act actually regulates
The act is short. We opened its text through the e-Gov law database on 2026-09-12. Its first five articles cover everything relevant to a bather.
| Article | What it says (summary of the Japanese text) | Relevance to tattoos |
|---|---|---|
| Article 1 | A "public bath" is a facility that bathes the public using hot water, sea water, hot-spring water or the like. | Sento and onsen day-use baths fall under the same definition. |
| Article 2 | Anyone running a public bath as a business needs the prefectural governor's permit. | Prefectures license baths; they do not license bathers. |
| Article 3 | The operator must take measures for ventilation, light, warmth, cleanliness and other matters needed for bathers' hygiene and public order (風紀); the standards are set by prefectural ordinance. | This is the hook prefectures use for local rules. Tattoos are not named here. |
| Article 4 | The operator must refuse anyone believed to have an infectious disease. | The only refusal the law requires. Tattoos are not an infectious disease. |
| Article 5 | Bathers must not foul the bath or act in ways harmful to public health. | Conduct, not appearance. |
The one Japanese sentence worth quoting is Article 4: 「営業者は伝染性の疾病にかかつている者と認められる者に対しては、その入浴を拒まなければならない。」 That is the whole of the mandatory refusal. Everything else a bath refuses, it refuses by choice, under the general freedom of a business to set terms, sometimes with reference to Article 3's public-order wording as interpreted in a prefectural ordinance. We did not open the ordinances for this article and do not claim what they say about tattoos; readers who need that should read their prefecture's 公衆浴場法施行条例 directly.
Sento vs onsen: the legal and cultural difference
Legally there is one category. Culturally and commercially there are two, and the tattoo rule tends to follow the commercial category rather than the water.
| Point | Neighbourhood sento | Onsen day-use bath, super sento, spa |
|---|---|---|
| Law | Public Bath Act | Public Bath Act |
| Price | Regulated per prefecture; Tokyo adult ¥600 from 2026-08-01 (Tokyo Sento Association) | Set by the operator; in our list ¥1,000 to ¥2,200 for day-use baths |
| Water | Usually heated tap or well water; some are onsen | Usually spring water; some are not |
| Who it serves | Residents, daily | Visitors, occasionally |
| Typical tattoo rule | Often none written; some publish an explicit welcome (Tokyo examples below); some post a paper refusal | Often a written cover-sticker rule with a size and count; some explicit welcomes; some refusals |
| Where to look | Door sign, association listing, the sento's own site if any | FAQ or price page on the official site |
In our verified list the pattern is visible. The clearest tattoo-OK statements come from small Tokyo sento with their own FAQ pages, from municipal baths in Beppu and Kusatsu, and from private saunas; the clearest cover rules come from super sento chains. Kusatsu's three town baths put it plainly in their FAQ: they do not particularly refuse the entry or bathing of tattooed visitors, and they name international visitors as part of the reason. That is a municipality choosing openness under the same act that another operator uses to justify a ban.
| Facility | Area | Policy | Source | Checked |
|---|---|---|---|---|
| Kusatsu Onsen Gozanoyu, Ohtakinoyu, Sainokawara (town baths) | Gunma, Kusatsu | Tattooed visitors not refused; FAQ names international visitors as part of the reason | Official FAQ | 2026-09-12 |
| Takegawara Onsen (municipal) | Oita, Beppu | Tattoo-OK, tagged on the city tourism association site | Beppu tourism tag page | 2026-08-03 |
| Koganeyu (黄金湯), neighbourhood sento | Tokyo, Sumida | Tattoo-OK, stated in the sento's own Q&A | Official Q&A | 2026-08-03 |
| Yudonburi Sakaeyu, neighbourhood sento | Tokyo, Taito | Tattoo-OK, stated in the sento's FAQ | Official FAQ | 2026-08-03 |
| Maenohara Onsen Sayano Yudokoro, super sento | Tokyo, Itabashi | Cover-required: up to 2 stickers of 11×20 cm, ¥310 each | Official notice | 2026-09-12 |
The Beppu and Tokyo rows carry the verified list's check date of 2026-08-03; the Kusatsu and Sayano Yudokoro pages were re-opened on 2026-09-12.
What the national tourism body says
The Japan National Tourism Organization's site carries an article dated 2020-12-08 on onsen and tattoos. Its position, quoted exactly: "Today, having a tattoo will not prevent you from experiencing an onsen or sento." The article's advice is the practical set most travellers already know: cover small tattoos with a bandage or wrap, choose accommodation with a private bath, ask ahead when unsure, and look for facilities that state acceptance rather than those with prohibition signs. It also cites a 2015 Japan Tourism Agency study; we could not open the original agency release on 2026-09-12 and discuss what that means in the cover sticker guide.
Why "unconfirmed" is the honest label
A directory that wants to look complete has an incentive to mark every bath without a refusal sign as tattoo-friendly. That produces a long list and a bad afternoon when the counter says no. Our rule is the reverse: a facility is marked tattoo-OK only when the facility itself, or its municipality or tourism association, has published the policy; the source URL and the date we read it sit next to the entry; and facilities whose pages are silent are labelled "unconfirmed".
- Published by the facility or its municipality. An FAQ, a notice, a price page, an official social account, or a city tourism site's tag page. Not a blog, not a review, not a directory.
- Dated. The list's 112 entries were checked on 2026-08-03 and 2026-08-04; entries used in these guides were re-opened on 2026-09-12. When a page changes, the date and the label change.
- Three states, not two. Tattoo-OK (91 entries), cover-required (21 entries, with the sticker size and count where the facility gives them), and unconfirmed (everything else among 10,470 facilities).
- Silence stays silent. A sento with no statement is not "probably fine". It is unconfirmed, and the app says so.
Facilities on the map: 10,470
With a published tattoo policy: 112 (91 OK + 21 cover)
Share with a published policy: 112 ÷ 10,470 = 1.1%
→ Roughly 99% of Japanese baths have said nothing in public about tattoos. Any list claiming hundreds of tattoo-friendly baths is filling that silence with guesses
How to read a facility's own rule
Three phrases cover nearly every published policy. Learn them and you can read a Japanese notice without translation.
| Phrase on the page | Meaning | What to do |
|---|---|---|
| タトゥーのある方もご利用いただけます / 気にせずご利用いただけます | Tattooed guests may use the facility | Go. This is the tattoo-OK label. |
| カバーシールで覆える場合に限り / 隠していただければ | Only if covered by the facility's stickers | Check the size and count, buy their sticker at reception. Cover-required label. |
| 刺青・タトゥーのある方のご入浴をお断り | Refused | Do not enter. If no sticker exception is written, a sticker will not help. |
| Nothing | Unconfirmed | Ask at the counter before paying, or email ahead. |
Frequently asked questions
Is it illegal to enter a sento with a tattoo in Japan?
No. The Public Bath Act (公衆浴場法, Act No. 139 of 1948) regulates permits, hygiene and the refusal of people with infectious diseases; the words 入れ墨 and タトゥー do not appear in it. A tattoo ban is a house rule set by the operator, which is why it varies from one bath to the next and can change overnight.
Are sento more relaxed about tattoos than onsen?
Often in practice, but not by law. Both are public baths under the same act. Neighbourhood sento, which are price-regulated and serve residents, more often have no written rule; large onsen resorts and super sento, which take bookings and serve tourists, more often publish a cover-sticker rule. In our verified list the clearest tattoo-OK statements come from small sento and private saunas, and the clearest cover rules from super sento.
What does 'unconfirmed' mean in Tattoo OK Map?
It means the facility's own page, or its municipality's, says nothing about tattoos. We do not turn silence into a yes, because the person at the counter can still refuse you. Only facilities that have published a policy are marked tattoo-OK or cover-required, each with a source URL and the date we last read it.
Tattoo OK Map: 10,470 baths, three honest labels
Tattoo OK Map shows 10,470 onsen, sento and saunas across Japan, drawn from public bath registers and open data. Each facility is one of three things: tattoo-OK with a source URL and check date, cover-required with the sticker rule where published, or unconfirmed. Nothing is promoted to tattoo-OK on the basis of a blog or a directory. Five interface languages: English, Japanese, Korean, Simplified and Traditional Chinese.
Tattoo OK Map
Find onsen, sento and saunas in Japan that admit tattoos. Every verified entry has a source URL and a check date
Free with ads; a one-time Pro purchase removes them. No account. The verified list is also on the web at /tattoo-onsen/list.html (Japanese).
Related guides
- Tattoo cover sticker sizes at Japanese onsen — the cover-required rules in numbers
- Tattoo-friendly onsen and saunas in Kyoto — sento culture in a city with few springs
- Nagano onsen and tattoos — a whole prefecture of "unconfirmed"
- Private onsen with tattoos in Hakone
- Tattoo onsen in Okinawa
- Verified list of tattoo-OK baths (Japanese) — all 112 entries with sources
Sources
All checked on 2026-09-12.
- e-Gov law database, 公衆浴場法 (Public Bath Act, Act No. 139 of 1948), Articles 1 to 5
- JNTO, "Japanese Onsen and Ink—The Tattoo Taboo" (2020-12-08)
- Tokyo Sento Association, admission price notice (adult ¥600 from 2026-08-01)
- Kusatsu Onsen Gozanoyu, FAQ (policy of the three town baths)
- Beppu City Tourism Association, tattoo-permitted facilities tag page
- KANAU WORKS, verified list of 112 facilities with sources and check dates