Super Sento’s “Banned Behaviors” Spark Debate — 5ch Asks: “What’s Wrong With Blow-Drying Your Crotch?”

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The story

A list of “things you shouldn’t do at a super sento (bathhouse)” posted on the official TikTok account of Spa Mettsa Otakaryusenji no Yu, a bathing facility in Nagareyama, Chiba Prefecture, became the subject of an Otonanser article — and went on to spark a thread on 5ch’s News Speed+ board. Among the behaviors cited in the article, like “getting into the cold bath while still sweaty from the sauna” and “pointing a hair dryer at your crotch,” commenters were split: some said it “looks gross,” while others shot back “what’s actually wrong with that in the first place.” The chat even wandered off into how unsanitary Edo-period bathhouses were and how athlete’s foot actually spreads.

11/4 (Wed) 15:15 JST

Otonanser

The official TikTok account of the bathing facility Spa Mettsa Otakaryusenji no Yu (Nagareyama, Chiba Prefecture) shared things you shouldn’t do at a super sento, as well as behaviors that make staff’s job easier. When Otonanser published an article on October 30 titled “Guilty of this? Super sento staff reveal the things you absolutely must not do,” it drew a huge response from readers.

Source: news.yahoo.co.jp / Original article here

What people said

10AnonymousNov 5, 2026 07:00
Is blow-drying your crotch really not allowed?
Does nobody here have body hair?
16AnonymousNov 5, 2026 07:02
Re: #10
If you're good-looking it'd be fine, but it's only gross old guys who do the crotch hair-dryer thing, so it just looks disgusting.
62AnonymousNov 5, 2026 07:28
Re: #10
Never seen it myself, but I guess people really do that.
146AnonymousNov 5, 2026 08:00
Re: #10
Hope they slip up and go "OW, HOT!"…
29AnonymousNov 5, 2026 07:07
In the women's bath, even when there's a line because there are only like 4 washing stations, people calmly slather on hair treatment and keep fussing with their hair.
I've watched dozens of women hog the hair dryer at the sink the entire time, from when I get in the bath until I leave, lol.
217AnonymousNov 5, 2026 08:27
Re: #29
Mister, how would you even know that?
59AnonymousNov 5, 2026 07:25
The super sento near my house has a sign up saying they'll call the police if you're caught doing something disruptive.
What exactly counts as "disruptive," though?
60AnonymousNov 5, 2026 07:25
If you're gonna sweat, don't come to the sauna.
Gross.
61AnonymousNov 5, 2026 07:27
Re: #60
If you don't sweat, go see a doctor.
63AnonymousNov 5, 2026 07:28
I get the sauna and hair-dryer etiquette, but athlete's foot risk isn't limited to bathhouses — it's a risk in any building where you take your shoes off to get in.
…dentists, clinics, karaoke boxes, internet cafes, tatami-room izakaya, shrine prayer halls, temple main halls…

As a countermeasure, always carry cheap slippers from the 100-yen store, or carry 100-yen-store plastic bags and slip them onto your feet whenever you enter a place where you take your shoes off.
66AnonymousNov 5, 2026 07:29
Re: #63
Yeah, you could probably catch it from hospital slippers too.
75AnonymousNov 5, 2026 07:32
What's actually wrong with using a hair dryer on your crotch?
76AnonymousNov 5, 2026 07:34
Re: #75
Most of the guys who do it are filthy middle-aged men.
Gross.
80AnonymousNov 5, 2026 07:36
Edo-period bathhouse tubs were way worse.
Apparently the water started out clean, but by the end of the day it had turned brown and murky, basically sludge.
83AnonymousNov 5, 2026 07:37
Re: #80
Can't really be helped — there was no running water or sewage system back then.
90AnonymousNov 5, 2026 07:40
Classic move by groups of about 4 friends who come together.
They hog the bath just to chat with their buddies.
There are only 4 of those little tub baths (tsuboyu), and all four groups just dip their feet in and sit there gabbing for like an hour.
Just sit on a chair and talk, seriously.
93AnonymousNov 5, 2026 07:41
Re: #90
Yeah, there's always someone who just keeps chatting forever.
So annoying.
92AnonymousNov 5, 2026 07:41
Splashing water around loudly when you get into the cold bath is seriously unpleasant for everyone nearby.
95AnonymousNov 5, 2026 07:42
Re: #92
After a sauna, that actually feels great though.
116AnonymousNov 5, 2026 07:49
Everyone gets into the bath without washing their dirty feet first, so is that supposed to be fine?
119AnonymousNov 5, 2026 07:50
Hold on a second.
Going straight from the sauna into the cold bath is the whole point, isn't it?
I'd even call that the best part of sauna culture.
153AnonymousNov 5, 2026 08:02
Re: #119
You're supposed to rinse off with water before getting into the cold bath, you know?
It's not just about washing off sweat and staying clean — it also lowers your risk of triggering a heart attack from the shock, so you really should do it.
145AnonymousNov 5, 2026 07:59
Athlete's foot fungus exists anywhere you go barefoot, not just in baths.
If you wash your feet thoroughly as soon as you get home from a place like that, you basically won't get athlete's foot.

The people who end up getting it are the ones who don't have that mindset or habit in daily life.
I'm saying this as someone who's had athlete's foot once myself, so trust me.
150AnonymousNov 5, 2026 08:01
Re: #145
Well, if you hate athlete's foot that much, you shouldn't be going to communal baths in the first place, lol.
158AnonymousNov 5, 2026 08:04
Re: #145
You can catch it from hospital, restroom, or any shared public slippers in the first place.
Especially in summer, seeing someone in bare feet and sandals slip on public slippers is really gross.
157AnonymousNov 5, 2026 08:04
I don't do the sauna, but I go back and forth between the regular hot bath and the cold bath.
161AnonymousNov 5, 2026 08:05
Re: #157
Alternating hot and cold baths feels great too, right?
165AnonymousNov 5, 2026 08:06
Re: #157
I prefer cooling off in the open air at an outdoor bath.
194AnonymousNov 5, 2026 08:18
King Ghidorah
200AnonymousNov 5, 2026 08:19
Re: #194
What a coincidence!

Background and Key Points of the Debate

Bathhouse etiquette rules like “wash your body before getting into the tub” and “rinse off sweat before entering the cold bath after a sauna” are, in most cases, not legal requirements but guidelines each facility posts and promotes on its own — with no penalties attached, which is exactly why reactions among users vary so widely. On the matter of using a hair dryer on one’s crotch, the thread saw a clash between those who criticized it as unpleasant to look at and those who called it a matter of personal freedom, and the fact that the facility’s request was rooted in “consideration for others” wasn’t fully understood by everyone. There’s also a broader issue at play: risks like athlete’s foot transmission exist in plenty of places besides bathhouses, yet bathhouses alone tend to get singled out as the problem.

*This article is composed as an excerpt and summary of the 5ch (News Speed+) thread “[♨] ‘Getting into the cold bath still sweaty from the sauna,’ ‘Hair dryer on the crotch…’ — Anger Floods in Over Super Sento’s “Banned Behaviors”.”

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