Chichi no Yu, Ikebukuro — A Shop Named After a Bath It Doesn't Own, and Two Coupons Worth Exactly Zero Yen

ElonI open a lot of price pages that are trying to hide something. This one is trying to hide that it has nothing to hide. Underneath the neon and the two discount badges, Chichi no Yu charges ¥200 a minute — exactly ¥200, every course, every extension, no exceptions — and then hands you back a flat ¥1,000 if you're new and ¥2,000 if you've been here before. That's the whole model. You can do it on your fingers. What's built on top of it is a 22% OFF coupon that lowers the course price by zero yen, a "limited campaign" a customer documented running in November 2020, and a price list that exists only as a JPEG uploaded to somebody else's WordPress in April 2021. And the bath in the shop's name? It's in a love hotel. You rent it. Nobody tells you that anywhere on this listing.

There's a particular kind of listing that rewards arithmetic, and it's usually the one that looks the least mathematical.

乳の湯 / Chichi no Yu — the name means, roughly, Bath of Breasts — sits at 東京都豊島区池袋2-65-19, ERビル B-9, filed by Cityheaven as エステ・アロマ（受付型エステ／池袋北口・西口）: esthe and aroma, reception-type, Ikebukuro north and west exits. Phone 03-5904-8094. Open 10:00 to 24:00, 年中無休 — no closing days, ever. Official site chichinoyu.tokyo. Say 「ヘブン見た」 when you call.

The concept copy is doing a great deal of work. It describes the place as a 大人の健康ランド — an adult health-spa complex — and lists its 効能, its medicinal benefits, the way a hot spring resort would: neuralgia, muscle pain, joint pain, frozen shoulder, bruises, sprains, virility, general health, and, my favourite, 家庭円満. Domestic harmony. Followed immediately by 笑 — lol. I've read a thousand of these pages and that is the first one that made me put my coffee down.

So let's take the spa at its word and go looking for the water.

The metronome

The price page is where this starts, and the first thing to say about it is that on Cityheaven it isn't a page. It's a photograph.

Click システム on this listing and you get one image, full width, hotlinked from corleone.work/wp-content/uploads/2021/04/ — a third-party WordPress install, in a folder dated April 2021. There is no HTML. No table, no text, no numbers a search engine or a screen reader can read. Every yen this shop charges lives inside a JPEG on someone else's server, and the <img> tag has a stray space in the URL.

Fine. I read the JPEG. Here it is, in text, for what I believe is the first time anywhere:

Below it: 入会金 ¥2,000 (membership), 指名料 ¥1,000 (nomination), 本指名料 ¥1,000 (repeat nomination), 延長 20分 ¥4,000〜 (extension). The official site carries the identical table with two small edits — it labels the ¥1,000 as 写真指名料, photo nomination, which is clearer, and it prints the extension as a flat ¥4,000 with no 〜. Two price documents, five courses, ten figures, and they agree to the yen. Credit where it's due; that is rarer than it should be.

Now divide.

Look at the shape of that. The rate falls to a floor at 75 minutes and then climbs back up. The three-hour course is worse value per minute than the 75, in both columns. That is the opposite of how this industry prices time, and it is not an accident. It falls out of something much simpler.

Multiply each course length by ¥200:

Ten prices. Ten exact hits. And the extension — ¥4,000 per 20 minutes — is ¥200.00 a minute to the sen.

This shop has one price: ¥200 a minute. Everything else is a flat rebate of ¥1,000 or ¥2,000 bolted onto every course except the 60. There is no volume discount, no long-stay reward, no peak or off-peak, no weekend rate, and no tax notation anywhere on either document. It is the most honest price board I have costed this year, and the shop has never once said so out loud.

And because the rebate is flat rather than proportional, it decays. For a member it's worth 13.3% of the board on the 75-minute course and 5.6% on the 180. That is the entire explanation for the rising per-minute curve, and it produces the single most useful line in this article:

Buy the 75. It is the cheapest minute in the building and the shop's own numbers say so five different ways.

Two coupons, zero yen

This listing carries exactly two coupons. Both are badged. Neither changes the price of a course by one yen.

The coupon price and the published new-customer price are the same number. Not close — the same. ¥14,000 is what the price image says a first-timer pays for 75 minutes, and ¥14,000 is what the 22%-OFF coupon delivers.

So where does 22% come from? From the 通常 column, which each coupon builds itself. Copied exactly from Coupon 1:

¥18,000 minus ¥14,000 is ¥4,000, and ¥4,000 is 22.2% of ¥18,000, so the badge is arithmetically correct. I want to be fair about that: nobody here is doing bad multiplication. The problem is the three line items making up the gap.

The ¥1,000 TENGA and the ¥1,000 costume are already free. Both price documents — the Cityheaven JPEG and the official site's own table — carry a highlighted box marked 極バスタイム stating that from the 75-minute course upward, 基本プレイ・TENGA・コスチューム are 全て無料, all free. And it isn't buried: the catch-copy printed under every single woman on this listing reads ◆TENGA・コスチューム無料◆. The shop advertises these as free to every visitor, on every card, and then sells you a coupon that discounts them.

And the ¥2,000 membership fee is already free too — twice over. The イベント tab has run a ヘブンネット掲載キャンペーン since 11/23, no year given, offering 入会金 ¥2,000 OFF plus free TENGA and costume for saying 「ヘブンを見た！」. And the front page carries a separate line: 「ＨＰ見た」で入会金(2,000円)が無料(0円)に — say you saw the homepage, membership is free. Two independent standing routes to the same waiver, neither of which requires a coupon.

Net effect of Coupon 1, against simply telephoning and saying the magic words: ¥0.

Coupon 2 is worse than that. It has no new-customer restriction, so a returning customer can present it — and its ¥17,000 is ¥1,000 more than the ¥16,000 the board says a 会員 pays for the same 90 minutes. As published, the 19%-OFF coupon is a thousand-yen surcharge. I assume in practice the front desk charges the better number. But the number on the page is the number on the page.

One more thing neither coupon's 合計 contains: the ¥1,000 nomination fee. So the "total" is not a total the moment you choose anybody.

The ¥2,000 that nobody has paid since 2020

The coupons date themselves to 23 November 2023 — thirty-three months as of today. The event page prints only 期間:11/23(木)～, with no year and no end.

But the review file goes back further than the coupons do, and it remembers.

From a customer review posted 3 November 2020:

スタッフさんからさやかちゃんを案内して頂きました。ヘブン見た！の割引で入会金2000円引きになります。

They recommended Sayaka. With the "saw it on Heaven" discount the ¥2,000 membership fee comes off.

Five years and nine months ago. The shop's own review section contains contemporaneous, customer-written evidence that the "campaign" waiving its ¥2,000 membership fee was operating in 2020, three years before the coupons that claim to introduce it. A fee that has not been collected in nearly six years is not a fee. It is a number kept on the books for the sole purpose of being subtracted.

Where the bath actually is

Here is the finding I did not expect, and it is the one that matters most to your wallet.

Cityheaven files this shop as 受付型 — reception type. Address, building, unit B-9. Nothing on this listing mentions a hotel. Nothing on this listing mentions delivery. The concept copy talks about 浴室 and 泡風呂 — the bathroom, the bubble bath — as though they were rooms you are about to walk into.

The shop's own official site tells a different story. Its ご利用ガイド is a three-step illustrated flow:

• STEP 1 — まずはお電話ください！ Call from around Ikebukuro west or north exit. Decide three things: time, course, whether you're nominating. 後はアナタのお好きなホテルに向かうだけ！ — then just head to the hotel of your choice.
• STEP 2 — チェックインのお電話！ Call again from the room. Give your name, the hotel's name, the room number. Wait.
• STEP 3 — いよいよ女の子が到着！ She arrives. プレイ料金は直接女性にお支払いください — pay her directly. Then, on the 75-minute course and up, まずはお客様より浴室にお入りください — you get in the bath first, and she comes in after.

The official site's own meta description calls the business 池袋のデリヘル型風俗エステ — a delivery-type esthe. Its navigation has a ホテルマップ. The reception at ERビル exists, and it is genuinely useful — but it is a photo-selection desk, not a venue.

I checked this against the customers rather than take a marketing page's word for it. Of 154 reviews on file, 40 — 26% — mention a hotel. Sixteen mention the reception. Every one of those sixteen that describes what happened next describes going to a hotel. Not one review in seven and a half years describes a room at the shop. A few, verbatim:

いつもは電話ですが受付に行って写真で選び、その後ホテルイン！ (25 May 2026)

初めてのエステということで緊張するなか受付に行って色々とスタッフの方に丁寧に説明してもらいホテルへ。 (9 Feb 2025)

電話への対応も丁寧で、その時点では３人の女の子が対応可能ということでした…おすすめのホテルも教えていただいて受付を済ませました。 (1 Mar 2022)

So: the bath in "Bath of Breasts" is a love hotel bathroom, and you rent it. That cost appears in no 合計, no 総額, no coupon table, and nowhere on the Cityheaven listing at all. I'm not going to invent a figure for you — the listing doesn't publish one and I won't pretend to know what room you'll take. But I will point out that it is a real, unavoidable, unlisted line on every bill this shop generates, and that it lands on top of a ¥14,000 course, not inside it.

It also lands on your clock. From 8 December 2019:

受付で空いている女の子を指名。おすすめホテルに向かうが、満室続きで3つ目でやっと入れました。

Picked an available girl at reception. Headed for the recommended hotel — full, and the next, and finally got into the third.

And the most quietly damning piece of writing on the whole listing is a customer's, not the shop's. A five-star regular, February 2025, filed a section header in his review that the shop should have written years ago:

【ホテルの選択】 お風呂が広いところがオススメです。せっかくのお風呂でのﾁﾁ堪能タイムが、半減してしまいます。

On choosing your hotel: pick one with a big bathroom. Otherwise the bath time — the entire point — is cut in half.

That is the single most valuable operational sentence available about this business, it determines whether you get what you paid for, and it exists because a customer volunteered it. The shop's ¥14,000 hangs entirely on a room the shop does not choose, does not price, and does not mention.

The 60-minute course is the wrong course

One more thing hiding in that guide, and it's specific.

STEP 3 splits into two branches. On 45分・60分コース: 女の子からシャワーセットを受け取ったら、お一人で妄想を繰り広げながら悶々とシャワータイム — take the shower set from her and shower alone. On 75分コース以上: you get in the bath and she comes in, and the 極バスタイム begins.

So the 60-minute course — the only one charged at the full unrebated ¥200 a minute — is the only one that does not include the bath the shop is named after. You pay the highest rate on the board for the version without the thing.

Also note that branch label: 45分. There is a 45-minute course in the shop's own usage guide. It appears on neither price table, on neither website. I have no idea what it costs and neither, as far as any published document goes, do you.

144 names, and a room for twenty

The 女の子 tab lists 144 women. That is a very large number for a business whose peak coverage today is twenty.

I pulled every published shift for the week of 21–27 August:

And then the number that reframes the roster: 74 of the 144 — 51.4% — have no shift at all in the published week. Seventy have at least one. The distribution of days worked:

Thirty-five women work exactly two days. Eight work four or more. Nobody works the full week. 144 is the marketing number; 20 to 30 is the operating number, and the median woman on this roster is a two-shifts-a-week freelancer.

Hour by hour, from today's thirty published shifts:

Peak is 15:00. Opening hour gets seven; the last half hour gets four. Average shift length is six and a half hours. And since there is no time-of-day pricing whatsoever — one board, 10am to midnight, seven days — the afternoon is free choice and the late night is whoever is left. Go between 13:00 and 18:00. It costs the same and you are choosing from seventeen to twenty women instead of four.

Weekends matter here in the ordinary direction, which is worth noting only because Yoshiwara soaplands run backwards: thirty on Friday and Sunday, twenty flat from Monday to Thursday. Fifty percent more women at the weekend, same price.

Eighteen to twenty-six, and mostly E-cup

Every published age on the roster of 144:

18 ×4, 19 ×11, 20 ×26, 21 ×12, 22 ×26, 23 ×19, 24 ×25, 25 ×11, 26 ×10.

Median 22. Mean 22.2. Range 18–26. There is nobody aged 27 or over. Not one, out of a hundred and forty-four. For an "adult health-spa complex" that sells itself on 癒し and デトックス, that is an extraordinarily tight band — I costed a Yoshiwara house last week whose roster ran 20 to 40 and built its flagship service on the over-35s. Here the entire distribution fits inside nine years, and half of it inside three. Heights run 142–168cm, with a mean of 156.7cm — genuinely short for a Tokyo roster.

Now the column you'd expect a shop called Bath of Breasts to lead with:

The modal woman at Chichi no Yu is an E-cup, and 80 of 144 — 55.6% — are D or E. Only 16 women, 11%, are listed at H or above.

I want to be careful about what that does and doesn't mean, because the shop is ahead of me on it. Its own front-page copy opens with a defensive line I've seen nowhere else: 『おっぱい店』とは名ばかりの『ぽっちゃり店』ではございません — we are not a chubby-girl shop trading under an oppai name. And a 44%-E-cup, 156cm, 22-year-old roster is exactly what that sentence is promising: not size, proportion. The 美乳 read, not the 爆乳 one. That's a legitimate position, honestly held, and the numbers back it precisely.

It is just not the position the name promises, and the shop should know which of those two a man is booking off. The site's other filter counts are worth having alongside: 新人 (new arrivals): 0. 写メ日記あり: 18. 動画あり: 29. 口コミあり: 35.

154 reviews in seven and a half years, and one man wrote 27

The 口コミ tab holds 154 reviews. I read all of them.

They span 24 January 2019 to 9 August 2026 — 2,754 days. That is one review every 17.9 days. For scale, I costed a Yoshiwara soapland last week that collects 1.1 reviews a day. This shop collects two a month, and has for seven and a half years:

Flat. No growth, no collapse — a business running at a completely stable, completely low level of public documentation for the better part of a decade.

The scores, across all 154:

Read the gap. The women score 4.93 and the value scores 4.50 — a 0.43 spread, on a board that is arithmetically one of the cheapest per-minute rates in Tokyo. Something is costing these men money that isn't on the price list, and I have already told you what it is: it has a bed in it and it isn't included.

Three more things from the pile.

The review base is one man and a long tail. A user called jinbei- has written 27 of the 154 — 17.5% of everything ever published about this shop — across 2022 to 2026, at a steady clip of roughly one every two months, on sixteen different women. His average is 4.82; everyone else's is 4.59. He is not a shill, as far as I can tell; he is a regular with a habit. But when one customer is a sixth of your public evidence, your public evidence has a shape, and that shape is his.

Seventy-six percent of the roster has never been reviewed. Thirty-five distinct women appear across 154 reviews. The roster is 144. 109 women — 75.7% — have no public feedback whatsoever, which the site confirms with its own filter: 口コミあり (35). The concentration at the top is heavy too: つばさ 10, みらい 7, かなで 7, いずみ 6, るみか 5, りな 5.

The replies are real, and that's worth saying. All but one of the 154 reviews has a reply from the shop. I normalised them: 67 distinct variants, and 33 of them name the woman — 「◯◯さんへの高評価も頂きありがとうございます！」 That is a person answering, not a macro. The last shop I audited sent ninety identical thank-yous. This one didn't, and given that its 154 reviews arrived at two a month, somebody has been sitting down and writing them for seven years.

And the net-booking channel is dead. The listing has a ネット予約 page. Filter the reviews by it and you get one review, dated 7 August 2019. One, in seven years. Which is consistent with the price image, where booking is explicitly a phone activity: ご新規様 当日10:00〜 — new customers, same day only, from 10am. 会員様 前日12:00〜 — members, from noon the day before. Booking is 完全無料, and a first-timer cannot reserve ahead at all. Take that seriously in combination with the shift table: at 10:00 there are seven women on the clock, and you are calling to compete for a 15:00 slot with members who booked yesterday.

The information, and where it isn't

A short list of things I had to go and find, which a customer shouldn't have to.

The アクセス field on this listing is empty. For a business you physically walk to, the Cityheaven listing gives an address and no station, no exit, no walking time, nothing. The official site has an excellent illustrated walking map from 池袋駅「北口」 up 平和通り, and states plainly: ERビル 1F奥の B-9 が受付です — reception is at the back of the ground floor, unit B-9. Useful, clear, and locked inside a JPEG on a different website. The Cityheaven header, incidentally, gives the unit as ERビル B－９ with no floor; the shop's own review signature — appended 84 times — says ERビル1F B-9. The official map settles it, but three of the shop's own documents had to be read to settle it.

Two of the listing's navigation links go to blank pages. Under the tab bar on every page of this listing sit two prominent bold links: 「ヘブンネット限定の得々割引開催中！」 and 「お風呂好きな殿方が貴女を待っています！」. Both render as a title and an empty anchor. Nothing else. The second one, for what it's worth, isn't aimed at you — it's a recruitment ad for women, sitting in the customer navigation, broken.

The official site is a Shift-JIS page from another era. It opens on an Enter/Leave splash gate, declares its charset with <meta https-equiv=...> — a typo that breaks the declaration, saved by a second correct tag — and carries a <meta name="keywords"> block. Its 更新履歴 column last moved on 23 April 2026, four months ago, while the Cityheaven roster has profiles updated within the last 24 hours.

And the splash page prints a different phone number. The footer of chichinoyu.tokyo's entry page shows 03-6912-6595, in an image and in its tel: link. Every other page of the official site, and every page of the Cityheaven listing, and all 84 signed review replies, say 03-5904-8094. For a business where the only functioning booking channel is the telephone, having two numbers — one of them on the first page a search engine hands a stranger — is not a cosmetic problem.

About the shop

乳の湯 / Chichi no Yu (チチノユ). エステ・アロマ（受付型エステ）, Ikebukuro north/west exits, 東京都豊島区池袋2-65-19 ERビル 1F B-9 — reception at the back of the ground floor, roughly 5–8 minutes' walk north from 池袋駅「北口」 up 平和通り per the official site's map; the Cityheaven アクセス field is blank. Tel 03-5904-8094 — say 「ヘブン見た」; note the official splash page prints 03-6912-6595 instead. Official site chichinoyu.tokyo. Open 10:00–24:00, 年中無休. Board, identical on both of the shop's price documents and with no tax notation anywhere: 60 min ¥12,000 / 75 min ¥14,000 / 90 min ¥17,000 / 120 min ¥23,000 / 180 min ¥35,000 for new customers; ¥12,000 / ¥13,000 / ¥16,000 / ¥22,000 / ¥34,000 for members — i.e. ¥200 per minute flat, minus ¥1,000 (new) or ¥2,000 (member) on every course except the 60. 延長 ¥4,000 / 20 min = the same ¥200/min. 入会金 ¥2,000, waived on two separate standing offers. 指名料 ¥1,000; 本指名料 ¥1,000 — neither included in any coupon 合計. Options ¥1,000 each: all-nude, TENGA, costume, panties-to-go — but TENGA, costume and basic play are free from 75 minutes up under 極バスタイム, which is also the threshold at which the bath becomes a shared activity rather than a solo shower. Two coupons, both dated 2023/11/23 with no expiry, badged 22% and 19% off, both of which price the course at exactly the published new-customer rate. Booking is by phone and free: new customers same-day from 10:00, members from 12:00 the previous day; a net-reservation page exists and has produced one documented booking since 2019. Service is delivered to a love hotel you choose and pay for, per the shop's own three-step guide and 26% of its reviews; payment is made directly to the woman. Roster of 144, ages 18–26 (median 22), heights 142–168cm, 55.6% listed D or E cup, 11% H or above; 70 have a shift this published week and 74 have none; 30 working today, peaking at 20 at 15:00 and falling to 4 after 23:30. 154 reviews over seven and a half years — one every 18 days — averaging 4.58, of which 27 are by a single customer. Japanese-language listing and phone line; no English support is indicated anywhere, and both the reception and the hotel are arranged in Japanese, by phone.

The verdict

Three stars, and I'll show my working, because the business underneath is better than the score.

Chichi no Yu prices honestly and prices well. ¥200 a minute, held flat across five courses, two customer classes, fourteen hours a day and seven days a week, with a rebate that rewards you for coming back and an extension rate identical to the base rate so that staying longer never punishes you. Ten figures on two documents and every single one reconciles. A ¥1,000 nomination fee. Free booking. No surcharges of any kind. I have taken apart shops charging three times this with a quarter of the internal consistency, and 154 customers over seven and a half years have scored the women 4.93 out of five.

What costs it two stars is that almost nothing about how this business actually works is where a customer would look for it. The price list is a photograph on a stranger's server. The walking directions are a photograph on the other website. The fact that you will be booking, entering and paying for a love hotel — the single largest unlisted cost of the visit, and the thing that decides whether the bath you came for is worth having — appears nowhere on this listing, and had to be established from the shop's own usage guide and forty customer reviews. The two coupons that occupy the most visually prominent real estate on the page deliver, between them, no discount at all. And a customer had to be the one to write down 「ホテルの選択：お風呂が広いところがオススメです」.

So, concretely. Buy the 75-minute course — ¥14,000 your first visit, ¥13,000 after that, and it's the best per-minute rate on the board in both columns. Skip the 60, which costs the most per minute and is the only course where you shower alone. Ignore both coupons; just say 「ヘブン見た」 on the phone, which gets you the same ¥2,000 waiver the coupons are built on. Call between 13:00 and 18:00, when seventeen to twenty women are working instead of four, at an identical price — and if you're new, remember you can only book from 10:00 on the day, so call early for an afternoon slot. Budget the hotel on top, and — this is the part the shop should be telling you and isn't — choose one with a big bathroom. You are paying ¥200 a minute for a bath. Make sure you rent one worth sitting in.

ElonWhat sticks with me is the asymmetry. This shop invented a ¥2,000 membership fee it hasn't collected since at least 2020, an ¥18,000 "regular price" that appears on no price list, and a 22% discount badge attached to a ¥0 discount — three separate fictions, all in service of making ¥14,000 feel like a bargain. Meanwhile the genuinely enormous number in this transaction, the love hotel you are about to rent, doesn't appear anywhere at all. They built a fake cost to subtract and left a real one out. And the single most useful sentence about how to spend money here — pick a hotel with a big bathroom, or you've halved what you paid for — was written by a customer, for free, in a review, in 2025. Delete the 22% badge. Print that line where the badge was. Same page, same pixels, and suddenly the shop is telling the truth about a price board that was already honest.