Ikebukuro Mondemiete — 池袋モンデミーテ, which the staff and the regulars shorten to Ike-Mon — is a hotel-health shop at Ikebukuro 2-7-3, Toshima-ku, second floor of the Watanabe No. 2 Building, three minutes on foot from the west exit of JR Ikebukuro Station. The phone is 03-5911-3090, and as always, "Heaven mita" — saw it on Heaven — is the phrase that opens the conversation. It is part of the Cinderella Group, an eight-shop operation whose Ikebukuro block alone includes Cosplay Sunshine, Hitozuma Hit Parade, Pumpkin and the onakura Heart Chocolat, and which runs the Mondemiete brand in Gotanda and Yokohama as well.
The concept is a single, narrow, testable claim: F-cup and above, nobody else. The shop's own meta description says it selects only women at F-cup or larger; the Cityheaven page calls it a kyonyu senmon — big-bust specialist — hotel-health shop. As of a renewal earlier this year the house uniform is a swimsuit, and there are 31 of them on the shop's costume page, from school swimsuits through leotards to a China-dress cut. Hours are 9:00 to 4:00 the following morning, every day of the year, which is longer than it used to be: a group notice dated July 31 extended four Ikebukuro shops to a 4 a.m. close. The physical reception desk still shuts at midnight; after that it's phone and web only, and after 0:00 every booking is delivery.
The Equation
Here is the board as published, identically on Cityheaven's system page and the shop's own site:
| Course | 9:00–12:00 | 12:00–17:00 | 17:00–24:00 |
|---|---|---|---|
| 50 min (Short) | ¥15,000 | ¥16,000 | ¥17,000 |
| 70 min (Regular) | ¥20,000 | ¥21,000 | ¥22,000 |
| 90 min (Middle) | ¥25,000 | ¥26,000 | ¥27,000 |
| 110 min (Semi-long) | ¥30,000 | ¥31,000 | ¥32,000 |
| 150 min (Long) | ¥40,000 | ¥42,000 | ¥44,000 |
Plus a delivery column — same prices at any hour, and the only prices available after midnight:
| Course | Delivery, any hour |
|---|---|
| 70 min | ¥23,000 |
| 90 min | ¥28,000 |
| 110 min | ¥33,000 |
| 150 min | ¥45,000 |
Now solve it. Take the morning column and subtract ¥250 for every minute:
- 50 min: ¥15,000 − ¥12,500 = ¥2,500
- 70 min: ¥20,000 − ¥17,500 = ¥2,500
- 90 min: ¥25,000 − ¥22,500 = ¥2,500
- 110 min: ¥30,000 − ¥27,500 = ¥2,500
- 150 min: ¥40,000 − ¥37,500 = ¥2,500
Five for five. The entire morning column is the function ¥2,500 + ¥250 × minutes, exact to the yen. Run the same subtraction across the other columns and the residual is ¥3,500 at midday, ¥4,500 in the evening, ¥5,500 on delivery — a clean ¥1,000 ladder. The board is not twenty arbitrary numbers. It is one rate, ¥250 a minute, and a door charge that rises by a thousand yen each time you ask for a more convenient way to buy it.
Sixteen of the nineteen published prices obey this exactly. All three that don't are the 150-minute row, and they miss in the same direction:
| Cell | The equation says | The board says | Difference |
|---|---|---|---|
| 150 min, midday | ¥41,000 | ¥42,000 | +¥1,000 |
| 150 min, evening | ¥42,000 | ¥44,000 | +¥2,000 |
| 150 min, delivery | ¥43,000 | ¥45,000 | +¥2,000 |
Read that as what it is: on the long course, and only on the long course, the shop charges the time-band surcharge twice. Midday costs ¥1,000 more than morning on every course from 50 to 110, then ¥2,000 more on the 150. Evening costs ¥2,000 more on everything up to 110, then ¥4,000 more on the 150. The morning column is the only one where the long course is priced honestly against its own formula — which is also, as we'll get to, the column with almost no one working in it.
The Evening Long Course Is the Worst Deal Above 70 Minutes
The practical consequence falls straight out of the per-minute table:
| 9:00–12:00 | 12:00–17:00 | 17:00–24:00 | Delivery | |
|---|---|---|---|---|
| 50 min | ¥300.0 | ¥320.0 | ¥340.0 | — |
| 70 min | ¥285.7 | ¥300.0 | ¥314.3 | ¥328.6 |
| 90 min | ¥277.8 | ¥288.9 | ¥300.0 | ¥311.1 |
| 110 min | ¥272.7 | ¥281.8 | ¥290.9 | ¥300.0 |
| 150 min | ¥266.7 | ¥280.0 | ¥293.3 | ¥300.0 |
Every column on this board rewards length — the per-minute cost falls as you buy more — except the evening column, where it stops falling and turns around. After 17:00, the 110-minute course is ¥290.9 a minute and the 150-minute course is ¥293.3. You buy forty more minutes and each one of them costs you more than the minutes you already had. The longest, most expensive product in the building is not the best rate in the building, and after seven in the evening it isn't even in the top two.
There's a knife-edge inside that, and it's worth carrying in your head. Put the nomination fee back in — because you are going to nominate — and the ranking flips. Solve for the fee at which evening 110 and evening 150 cost the same per minute and you get exactly ¥1,000. Below a thousand yen of fees, the 110 wins; above it, the 150 does. The shop's photo-nomination fee is ¥1,000 and its phone and repeat-nomination fee is ¥2,000. The published price of choosing a woman is sitting precisely on the tipping point of its own price board, and one yen either side of it changes which course you should buy.
Extending Is a Strictly Dominated Purchase, and the Board Proves It
Extensions are ¥5,000 for 15 minutes and ¥10,000 for 30 minutes. Both work out to ¥333.33 a minute — exactly one-third more than the ¥250 the ladder charges for the same time bought up front.
That ratio is not an abstraction. Because a rung on this ladder is 20 minutes for ¥5,000, ten thousand yen buys 40 minutes in advance or 30 in the room, and the arithmetic lands on exact equalities:
- 50 min + a 30-minute extension = ¥25,000 for 80 minutes. The 90-minute course is ¥25,000. Same money, ten more minutes.
- 70 min + a 30-minute extension = ¥30,000 for 100 minutes. The 110-minute course is ¥30,000. Same money, ten more minutes.
- 110 min + a 30-minute extension = ¥40,000 for 140 minutes. The morning 150-minute course is ¥40,000. Same money, ten more minutes.
The 15-minute extension does the same trick with a smaller margin: 50 + 15 costs what the 70 costs, 70 + 15 costs what the 90 costs, 90 + 15 costs what the 110 costs — each time handing the man who booked properly five free minutes. Because the extension price and the ¥250 marginal rate are both flat across time bands, these equalities hold in the morning, at midday and in the evening alike. There is no hour of the day at which extending beats booking the longer course, and there is no combination where extending even ties.
Which makes the extension what it always is on a well-drawn board: the impulse tax. The difference here is that the same shop that prices the impulse at a 33% premium also drew the disciplined column that makes the premium visible. Decide your number at the desk, not at the 45-minute mark.
Delivery Is Exactly the Evening Rate Plus ¥1,000 — Until Midnight, When It Isn't Optional
Four delivery prices, four courses, and the relationship is perfect:
- 70 min: evening ¥22,000 → delivery ¥23,000
- 90 min: evening ¥27,000 → delivery ¥28,000
- 110 min: evening ¥32,000 → delivery ¥33,000
- 150 min: evening ¥44,000 → delivery ¥45,000
A flat thousand yen, four times out of four, at any hour of the day. Which means delivery is a bargain at 10 a.m. relative to the evening list and merely the going rate at 8 p.m. — and it means that at 11:59 p.m. you can book 70 minutes for ¥22,000 and at 12:01 a.m. the same 70 minutes costs ¥23,000, because after midnight there is no other way to buy it.
The bigger midnight change isn't the thousand yen. It's that the 50-minute Short course does not exist in the delivery column at all. Before midnight the cheapest ticket in the building is ¥15,000. After midnight the cheapest ticket is ¥23,000 — a 53% jump in the minimum spend, purely because the short course vanished. If you are the kind of customer who buys the 50, the shop closes to you four hours before it closes.
Transport is separate and published:
| Destination | Fee |
|---|---|
| Love hotels listed in the shop's own hotel guide (Ikebukuro west) | Free |
| Other love hotels around the Ikebukuro north / west / east exits | ¥1,000 |
| Within 3 km of Ikebukuro Station | ¥2,000 |
| Within 5 km | ¥3,000 |
| Within 10 km | ¥4,000 |
Distances are calculated on Google Maps by surface road, which the shop says in writing. One discrepancy worth catching: Cityheaven's version of this table says free for "Ikebukuro west exit love hotels," full stop. The shop's own site says free for love hotels inside its hotel guide, and charges ¥1,000 for everything else in the west, north and east exit areas. If you picked your hotel off Cityheaven's wording, check the guide before you assume you're in the free zone.
The Numbers That Aren't on the Cityheaven Sheet
The card fee is disclosed — on a banner image, on the shop's own site, which is more than most manage. Three other things are not disclosed there, and one of them is money.
The special fee. The shop's own price page carries a line the Cityheaven fee sheet doesn't have at all: 特別料金 — "special fee," ¥1,000 to ¥3,000, with the note "applicable women incur an additional special fee." Which women? The page doesn't say. The only place I could find it made concrete is inside the shop's own booking simulator, where each bookable woman is listed with her fee: of the 23 women bookable at the time I ran it, 22 showed ¥2,000 nomination and one showed "¥2,000 nomination + ¥1,000 special fee." So it's real, it's rare, and it is discoverable — but only by opening a reservation tool, one name at a time.
The nomination fee is effectively ¥2,000, not ¥1,000. The fee table lists photo nomination at ¥1,000 and phone or repeat nomination at ¥2,000. The booking simulator lists every single bookable woman at ¥2,000. If you reserve online through the group's Club Cinderella system — which is how the shop pushes you to book, and what the points program requires — the thousand-yen rate does not appear to be on offer. Budget the two.
The 50-minute course can't be booked online. The same simulator's course menu starts at 70 minutes. The cheapest published price at this shop, ¥15,000, is a phone-or-counter product.
And the room is separate. This is a hotel-health shop, so that is the genre norm rather than a scandal, but the fee sheet has no line for it, and the two reviewers who bothered to fill in Cityheaven's "total paid" field both annotated their numbers the same way — 110 min, ¥35,000 (room fee not included) and 110 min, ¥30,000 (room fee not included). Whatever an Ikebukuro love hotel charges you for the rest, it lands on top of everything in every table above.
One more inconsistency, this one free of charge to you. Cityheaven's shop blurb announces that to celebrate the renewal, swimsuit cosplay is free for a limited period. The shop's own swimsuit page is headed "swimsuit option +¥1,000," and the booking simulator lists "swimsuit (¥1,000)" alongside "cosplay (¥1,000)." Two pages of the same business, two different prices for the same garment. Ask at the desk; it is a thousand yen, and it is the difference between the concept the shop advertises and the concept it invoices.
The Options Menu, Priced in Minutes
The option sheet is unusually long and unusually orderly — a six-tier ladder rather than the usual scatter:
| Tier | Contents |
|---|---|
| ¥1,000 each | Rotor, swimsuit costume, cosplay, panties, stockings, one photo, meet-up, foam-wash course |
| ¥2,000 each | Lotion bath course (70-minute courses and above only — the house specialty) |
| ¥3,000 each | Vibe, orgaster, watching solo play, watching urination |
| ¥4,000 each | Denma, facial, unlimited photos |
| ¥5,000 each | Immediate oral, swallow, 30-second video |
| ¥8,000 | AF |
| ¥10,000 | Unlimited-length video |
Faces are off-limits in any photo or video, and the meet-up option is restricted to repeat-nomination customers who have already seen that woman once — so the "meet her at the spot" fantasy actually costs ¥2,000 nomination plus ¥1,000 meet-up, and requires a prior visit. Convert the top of the ladder: the ¥10,000 video option costs exactly what 40 minutes of her time costs on the ladder, or 30 minutes as an extension. The ¥8,000 AF is 32 minutes. Whether that's worth it is your business, but it is useful to know that the option column and the time column are denominated in the same currency and the shop has never once said so.
The basic course, for what it's worth, is generous by hotel-health standards and the shop lists it plainly — the standard non-penetrative menu, with no limit on finishes stated in writing. On hygiene, the group publishes a partnership with the SSS Medical Institute, monthly mandatory testing or a doctor's certificate from each woman, medical-grade gargle and disinfectant soap at the shower, and condoms available on request — that last phrase doing the work it always does, which is telling you what the default is.
Three Coupons, and the Cheapest Minute in the Building
All three coupons on the board today carry the same two-day validity window and the same time-band note: +¥1,000 after 12:00, +¥2,000 after 17:00.
1. First-timer. 50 minutes, ¥10,000 — down from ¥15,000, badged 33% off. Per minute: ¥200.0, against a list ¥300.0. It is the biggest discount and the shortest course, and it is the only place in this shop's pricing where the ¥250-a-minute rate is genuinely broken in your favour.
2. Rookie nomination. 90 minutes, ¥22,000 — down from ¥25,000, badged 12% off, valid only the first time you nominate a designated new cast member, not valid on repeat nomination, minimum 90 minutes. Per minute: ¥244.4 — cheaper per minute than every single one of the nineteen published prices, including the morning long course at ¥266.7. Add the ¥2,000 the simulator actually charges for nomination and it lands at ¥266.7 a minute, which is to say: nominating a rookie for 90 minutes costs exactly what the 150-minute morning marathon costs per minute, and takes an hour less.
3. Review bounty. 70 minutes, ¥19,000 — down from ¥20,000, 5% off, plus 1,000 points for posting a review afterwards, once per cast member. Per minute: ¥271.4.
Behind the coupons sits the points system, and the points are larger than the coupons. Club Cinderella membership is free, points are 1 point = ¥1 redeemable in 1,000-point blocks, they expire one year after your last use, and there is no cap on how many you can spend in a single payment. Joining pays 5,000 points usable the same day — and that offer explicitly extends to past customers who never registered. On top of that, a first visit rebates points by course length:
| First-visit course | Points back | As % of the morning price |
|---|---|---|
| 70 min | 3,000 | 15.0% |
| 90 min | 4,000 | 16.0% |
| 110 min | 5,000 | 16.7% |
| 150 min | 6,000 | 15.0% |
The rebate rate peaks at 110 minutes — the same course that is the best per-minute rate in the evening column. Points post automatically around 7 a.m. the next day, which means they are useless to you tonight and worth exactly their face value tomorrow.
So the first-timer's real decision is between two instruments that both say five thousand: ¥5,000 off a ¥15,000 fifty-minute ticket today, or 5,000 points back on a ¥30,000 hundred-and-ten-minute ticket, spendable from 7 a.m. tomorrow and dead in a year. One is cash; the other is a coupon for a shop you have to come back to. There is also the 5,000-point signup bonus, which is the strongest single instrument here and the only one available to a walk-in who has never registered.
One honest caveat, because the terms don't resolve it: both the first-timer coupon and the event page carry the line "please refrain from combining with other discounts," and the event page separately says points may be used. Whether you can stack the 5,000 signup points onto the ¥10,000 first-timer course and walk out having paid ¥5,000 for fifty minutes is not something the published conditions answer either way. Ask before you book, not after.
106 Names, 120 Claimed, 26 Working This Week
The Cityheaven board lists 106 women. The shop's own page title says 120 enrolled. Somewhere between the two sits a fourteen-name gap that nobody explains.
The headline claim, though, holds up completely, which is rarer than it should be. Cup sizes across all 106:
| Cup | F | G | H | I | J | K | L |
|---|---|---|---|---|---|---|---|
| Women | 11 | 43 | 26 | 16 | 6 | 3 | 1 |
Zero women below F. The shop says it selects F and up and the board contains not one exception in 106 profiles. The modal size is G at 40.6%; 95 of 106 — 89.6% — are G or larger, and 26 of them, nearly a quarter of the house, are I or larger. Listed busts run 92 cm to 120 cm, mean 98.3.
The rest of the roster data is less obedient:
- Ages: 18 to 29, mean 22.25. Thirty-seven of the 106 — better than a third — are twenty or younger. But look at the distribution and there's a hole in it: 17 women aged 20, 2 aged 21, 14 aged 22, and zero aged 28. Ages in this industry are declared rather than verified, and declared numbers cluster; a cliff from 17 to 2 and back to 14 is the shape of a preference, not a population.
- Heights: 141 cm to 179 cm, mean 158.7. A 38-centimetre spread is genuinely wide and reads like real measurement.
- Waists: 54 cm to 61 cm. Sixty of the 106 are either 57 or 58. Eight centimetres of total range across a hundred-odd adult women is the field that got filled in at intake; the height column is the one doing real work.
- Engagement: 48 of 106 carry at least one review, 43 keep a photo diary — the shop calls it the oppai diary — 50 have video, and 101 of 106 have the Okini Talk messaging feature switched on.
And then the number that reframes the whole board. I pulled the full seven-day schedule: only 26 of the 106 women have a single shift entered for the coming week. Fifty-nine shifts total across seven days — an average of 8.4 women a day out of a 106-name roster. Today, a Friday, ten are working. One hundred and six is the catalogue. Eight and a half is the shop.
Nobody Works the Cheap Hour
Here is where the price board and the shift board have an argument.
The cheapest column on the fee sheet is 9:00–12:00 — the ¥2,500 door charge, the only column where the 150-minute course obeys the equation, the only place you can buy 150 minutes at ¥266.7. It is also, as far as this week's schedule goes, almost entirely unstaffed.
Across all 59 shifts in the next seven days, the earliest start time is 10:30, and there are four of those. One more starts at 11:00. That is five shifts out of fifty-nine — 8.5% — that can serve a booking inside the shop's cheapest price band, and not one of them starts before 10:30. The first ninety minutes of a nineteen-hour trading day, priced at the best rate in the building, has nobody in it all week.
Today is a clean illustration. The board opens at nine. The first woman starts at 13:00. The full day, as listed: 13:00–22:00, 14:00–20:00, 14:00–23:00, 15:00–20:00, 15:00–21:00, 15:00–22:00, 17:00–19:00, 19:30–22:30, and two running 22:00–4:00. Peak coverage is a five-hour block from 15:00 to 20:00 — which sits astride the 17:00 boundary, so half of the busiest window is charged at the evening rate.
Twelve of the week's 59 shifts run to the 4:00 close, which is to say the extended late-night hours are real and staffed at about a fifth of capacity. The morning hours are neither.
654 Reviews, and the One Score That Sags
Cityheaven's counter reads 655 reviews. I paged through the entire file and pulled 654 distinct scored entries, with visit dates running from December 14th, 2018 to August 11th, 2026 — nearly eight years of continuous record. That's a deep file by any standard, and it says two things clearly, one of them flattering.
Overall: mean 4.40, median 4.5. A hundred and nineteen of the 654 — 18.2% — are straight 5.0s. And the lowest score in the entire eight-year history is a 3.0, appearing four times. Not one review below three. Not one.
The component scores are where it gets interesting:
| Component | Mean | Scored by |
|---|---|---|
| 女の子 — the woman | 4.86 | 488 |
| プレイ — the session | 4.78 | 456 |
| 写真 — photo accuracy | 4.66 | 468 |
| スタッフ — staff | 4.20 | 428 |
| 料金 — value for money | 4.10 | 465 |
Value is the floor, and it's the only component with a genuine spread: of the 465 men who scored it, 136 gave it a 3 or worse — 29.2%. Compare that to the woman-score column, where 423 of 488 gave a straight 5. Almost nobody at this shop is disappointed by who showed up. Nearly a third of them think they paid too much. A 0.76-point gap between "the woman" and "the price" is the widest spread on the card, and it is the most honest summary of the place I can give you: the product is excellent and the board knows it.
The volume tells a second story, and this one isn't flattering at all. Reviews by year of visit:
| 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|
| 25 | 45 | 31 | 63 | 192 | 171 | 101 | 25 |
That 2026 figure covers visits through August 11th — seven and a half months — which puts the year on pace for roughly 37, down 81% from the 2023 peak. The most recent review in the file was written on August 13th, thirty-six days before I'm writing this. A shop that was collecting sixteen reviews a month in 2023 is now collecting two or three.
Which is exactly when you'd expect to see a shop start paying for reviews. And it does: coupon number three pays 1,000 points for posting one. I can't tell you the shop introduced that coupon because the flow dried up — nobody publishes that — but the two facts are sitting next to each other on the same page, and the timing is what it is.
One last thing the review file gives you that the girl list doesn't. Forty-eight distinct current-roster women are named across those 654 reviews, and the top five hold 159 of them — Mian at 40, Midori at 36, Mei at 29, Yuuhi at 28, Yuki at 26. Which means 331 reviews, 50.6% of this shop's entire written history, belong to women who are no longer on the board. And the shop's own August repeat-nomination ranking — Mei, Mian, Wakana, Yuki, Yume — doesn't match the lifetime list either: Midori and Yuuhi, second and fourth by lifetime reviews, are absent from it, and Wakana, who carries two reviews and a catch-line reading shock comeback, is third. The review count is a stock. The ranking is a flow. Read whichever one answers your actual question, and don't confuse them.
Getting There, and Paying There
Three minutes from the JR Ikebukuro west exit, at Ikebukuro 2-7-3, second floor. That's the west side, away from the Sunshine crowds, in a block dense enough that a second-floor office building draws no attention whatsoever. Reception is open 9:00 to 24:00; the shop trades to 4:00; between midnight and four you book by phone or web and it is delivery only.
Payment is where this shop is quietly better than most. Credit and debit cards are accepted, processed through an online settlement link rather than a terminal in the room — you confirm the price, tell the staff you're paying by card, settle through the link, then tell them it's done. And the shop issues invoice-compliant receipts, which it will put out under a restaurant or company name rather than the shop's, with a revenue stamp attached on anything over ¥50,000. That is stated plainly on the price page, without embarrassment, and I have not seen a competitor put it in writing. Until September 30 all of that costs you nothing. From October 1, on current terms, it costs you fifteen percent.
The Verdict
- Price coherence: ★★★★★ — nineteen published prices, sixteen of them solving exactly to a flat door charge plus ¥250 a minute, and a ¥1,000 ladder between the four columns. I have not priced a cleaner board this year.
- Price honesty: ★★★☆☆ — same board, three cells where the long course pays the surcharge twice, and an evening column where the flagship 150 is worse per minute than the 110.
- Extension pricing: ★★☆☆☆ — ¥333 a minute against a ¥250 ladder, arranged so that every extension costs exactly what a longer course costs. Never buy one.
- Disclosure: ★★★☆☆ — hours, transport, options and the card fee all published, and invoice receipts volunteered. Minus a "special fee" of up to ¥3,000 that names no names outside a booking tool, a nomination fee that's ¥1,000 on the sheet and ¥2,000 in practice, and a swimsuit that is free on one page and ¥1,000 on two others.
- The card fee: ★★★★★ this month, ★☆☆☆☆ from October — a 15% surcharge is the largest number attached to this shop, and right now it is zero.
- Concept integrity: ★★★★★ — "F-cup and above" across 106 profiles with not one exception. The claim is the roster.
- Roster depth vs. availability: ★★☆☆☆ — 106 listed, 120 claimed, 26 with a shift this week, 8.4 working on an average day.
- Reputation: ★★★★☆ — 4.40 across 654 reviews over nearly eight years with nothing below a 3.0 is a genuinely strong file; the 81% collapse in volume since 2023 is the asterisk.
- Going back: ○ — before 12:00 if the board ever staffs it, 110 minutes rather than 150, nominated, card out before the end of the month.
What I keep coming back to is the two boards. The price board is the work of somebody rigorous — a single rate, a single door charge, a ladder between the columns, held to the yen across sixteen cells. The shift board is the work of somebody else entirely: a hundred and six names, twenty-six of whom are working this week, and a cheapest-hour window that nothing in the schedule can actually fill. Mondemiete has priced its mornings beautifully and staffed them not at all. Somebody in that office is very good at arithmetic. Nobody has shown them the roster.