Shirogane Platinum, Gotanda — The New-Customer Coupon Is Worth ¥6,000, and in Nine Wards the Mandatory Fees Are Also Exactly ¥6,000

ElonTwo things happened while I was pricing out Shirogane Platinum and I still can't decide which one is funnier. The first: the new-customer coupon is a flat ¥6,000 off, and the two fees you cannot avoid — designation and transport — come to ¥2,000 and ¥4,000 across nine of Tokyo's twenty-three wards. Two plus four is six. So in Toshima, Nerima, Kita, Itabashi, Suginami, Adachi, Arakawa, Edogawa and Katsushika, your all-in price with the coupon is the exact yen of the undiscounted list price. All three courses. Not close — identical. The second: in the shop's own home zone, where transport is ¥2,000, the coupon board resolves to exactly ¥300.00 a minute at 90, at 120, at 150, at 180, and at every thirty-minute step after that, without end. A perfectly flat line at the exact number I've been using as the central-Tokyo benchmark on this site for a year. Nobody designed that. It fell out of a ¥9,000 extension block landing on a ¥23,000 anchor. But it means the shop has, by accident, published the cleanest per-minute price in Tokyo — and priced its one-hour course above it.

There is a joke buried in this shop's name and I don't think it's on purpose.

白金 is a place — Shirogane, one of the two or three most expensive residential districts in Tokyo, a quiet slope of embassies and low-rise apartments northeast of here where the wives got their own coined nickname (Shiroganēze) in the nineties and never quite lived it down. 白金 is also, read differently, the Japanese word for the element platinum. White metal. So a shop that names itself 白金プラチナ has written platinum twice — once in kanji, once in katakana, in case the kanji didn't land — and then attached the whole thing to a delivery health operating out of Gotanda, which is two stops down the Yamanote and about as far from Shirogane in character as you can get without leaving Shinagawa Ward.

I say all this affectionately. Gotanda is a good town. It is also the least glamorous stop on the western arc of the Yamanote and everybody who lives in Tokyo knows it. The Meguro River runs under the tracks. The east side is office towers and the sort of chain izakaya that exists to absorb the 7 p.m. overflow from those towers. The west side, up the hill toward the TOC building, is where the phone numbers are. It is a salaryman's district, unpretentious to the point of being architecturally rude, and it has never once tried to be Shirogane.

So the name is aspiration, stated twice, in a town that doesn't do aspiration. Fine. Every shop does this. What's unusual is that the price list agrees with the name and the coupon doesn't, and the gap between them is the whole story.

Shirogane Platinum (Yumeoto) — 白金プラチナ(ユメオト), シロガネプラチナユメオト, Tel 03-5719-5220 — is filed on Cityheaven as デリヘル(スタンダード/五反田): delivery health, standard tier, Gotanda. Address ward: Shinagawa. Hours 10:00 to 04:00 the next morning, with reception opening an hour earlier at 09:00. 年中無休 — no closing day. Official site at s.pln.jp, group site at yumeoto.net.

The concept text contradicts itself in one sentence

Here's the shop's own description, in full:

厳選されたハイクオリティな女の子のみを、ロープライスでお客様にご案内し、他のデリヘルでは味わえない究極のリラクゼーションを提供する高級デリヘル店です。

A luxury delivery health that presents only carefully selected, high-quality girls at a low price, offering the ultimate relaxation you can't get at other delivery healths.

高級 — luxury, high-class. ロープライス — low price, in katakana, so you can't miss it. In the same sentence, twenty characters apart.

That combination isn't inherently a lie. Plenty of shops run a premium roster on a lean cost base and land somewhere genuinely good. But it is a testable claim, and the test is the price list, so let's run it.

Board one: the list, and the ¥350 door

The benchmark I keep returning to on this site is ¥300 a minute — the rate I've independently measured at delivery healths in Shibuya, at soaplands in Yoshiwara, at esthe shops in Ikebukuro, arrived at by shops that share nothing but a city. Three hundred yen a minute is roughly what an hour of central Tokyo costs.

Shirogane Platinum's entry course is ¥350.00 a minute — 17% above the benchmark. Its best list rate, the two-hour course, is ¥316.67, still above it. There is no course on the official board that reaches the Tokyo standard rate, let alone beats it.

So the ロープライス claim is not true of this board. That's not an accusation of dishonesty; it's just a fact about the numbers, and the shop has an answer for it, which we'll get to. But if you read the price list and stop there, you are looking at a shop priced at the upper end of standard, wearing the word low in its own description.

Two extension prices, and the ¥1,000 tax on changing your mind

Look at the last two rows again, because most listings only have one and this one has two.

以上30分ごと ¥9,000 — "each 30 minutes beyond the above," i.e. the price of building a 150- or 180-minute booking at the time you book it. 延長30分 ¥10,000 — "extension, 30 minutes," the price of deciding, once you're already in the room, that you'd like more.

Same thirty minutes. ¥1,000 apart. That's an 11.1% surcharge on indecision, ¥300 a minute versus ¥333.33 a minute, and it is the single cleanest piece of price signalling on the page: the shop is telling you, in the only language shops speak, commit at the door.

It also produces a hard rule that I'll state once and then keep using:

Book the length you want. Every route through the on-the-spot extension is ¥1,000 worse per block than the equivalent course, at every length, on both boards. There is no exception anywhere in this listing.

Where the cheapest half-hour actually is

The marginal steps on the list board are worth reading separately from the averages:

The 60-to-90 upgrade is the cheapest thirty minutes this shop sells. ¥8,000, against ¥9,000 for every subsequent block and ¥10,000 if you wait and ask. If you were going to book the hour anyway and you have the flexibility, the extra half hour is the best-priced thing on the official board — and it's the only step that comes in under the ¥300 marginal rate charged everywhere else.

Board two: the new-customer coupon

Three coupons run on the listing, and they have a shape worth looking at closely.

Every coupon is ¥6,000. Identical. The percentages on the badges — 29%, 21% — are the same ¥6,000 divided by three different course prices, which is why the biggest-looking discount sits on the smallest course. That's standard practice and I'd normally leave it alone, except that here it does something to the value curve that I've rarely seen stated.

Watch what a flat discount does to the per-minute column:

The order reverses. On the list board, longer is cheaper per minute — 350, 322, 317, descending the way price boards are supposed to. On the coupon board, longer is more expensive per minute — 250, 256, 267, climbing.

The mechanism is simple once you see it, and it's the reason flat discounts behave differently from percentage discounts. A flat ¥6,000 doesn't touch the marginal price of the next thirty minutes — that's still ¥8,000 or ¥9,000, still ¥267 to ¥300 a minute. But it drops the average on the shortest course furthest, because ¥6,000 is a bigger share of ¥21,000 than of ¥38,000. Once your average (¥250) sits below your marginal (¥266.67), every additional minute you buy pulls the average up. The coupon turns the 60-minute course — the worst deal on the list board — into the best one.

And you get to use it once. All three coupons are 【ご新規様限定】, first-time customers only. So the real question this listing poses isn't should I use the coupon, it's which single course do I spend it on, and the answer changes depending on how much of the bill you're willing to look at.

The catch nobody puts in the badge: the coupon picks the woman

Look at that last column again. The 60-minute coupon belongs to かえで. The 90 belongs to れあ. The 120 belongs to きょうか.

Coupons on Cityheaven are issued per-cast, and this is completely normal, but the consequence at this shop is unusually stark because there are exactly three of them, one per course length. You cannot choose your course length and your companion independently at the coupon price. Choosing 120 minutes means choosing きょうか. Choosing かえで means choosing sixty minutes. The three women are 27, 20 and 29 respectively — different enough that this is a real choice and not a formality.

I'd put it this way: the discount is not attached to the shop, it's attached to three specific people, and the arithmetic below only applies if the person the arithmetic points at is the person you wanted. If she isn't, the coupon board doesn't exist for you and you're buying off the list board at ¥350 a minute. Worth knowing before you spend an hour optimizing.

The extension rule survives the coupon

Same check, discounted board:

Book the length you want. It holds on both boards, every time, and it costs you between ¥1,000 and ¥3,000 to forget it.

The fees, and the thing there is no row for

Two designation fees, and read them carefully because of what's missing:

No entry fee — good, and not universal; I've priced shops in Otsuka and Kanda that charge ¥2,000 to ¥3,000 just to become a customer.

But note what isn't on that table: a free designation option. At most shops, choosing from photographs is the cheap tier and asking for a repeat is the premium one. Here they're the same ¥2,000, which means Shirogane Platinum charges no loyalty penalty at all — going back to someone who was good costs exactly what picking a stranger costs. That is genuinely rare and genuinely pro-customer, and I want to give the shop full credit for it, because the ¥1,000 honshimei premium is close to industry standard and I've criticised it elsewhere on this site.

The flip side is that ¥2,000 is a floor rather than a fee. Unless you're going free — letting the shop choose — you are paying it. And since all three coupons are attached to named women, using the coupon means designating, which means the ¥2,000 applies. The page doesn't say the coupon includes it. I'd assume it doesn't and ask.

Transport: five rings, and no free one

Six wards, then eight, then nine. That's all twenty-three, which is a well-built dispatch table and rarer than it should be — most listings write 要相談 and let you find out at the door.

But there is no ¥0 row. The shop is in Shinagawa Ward. Shinagawa Ward is in Zone A. A hotel four minutes' walk from Gotanda station costs ¥2,000 to reach. Most delivery healths carve out a free ring around their own turf — the Tachikawa shop I priced last week gives you the station hotels for nothing — and this one doesn't. There is no address in Tokyo from which Shirogane Platinum will come to you for free.

So the minimum unavoidable add-on at this shop, from the closest hotel in its home ward, on any booking where you choose the person, is:

¥2,000 designation + ¥2,000 transport = ¥4,000.

Hold that number.

The ¥6,000 that cancels itself

Now put the coupon and the fees on the same line. The coupon is worth ¥6,000. The fees are ¥2,000 plus ¥2,000, ¥3,000 or ¥4,000 depending on where you sleep.

In Zone C — 杉並, 足立, 荒川, 板橋, 江戸川, 葛飾, 北, 豊島, 練馬 — the fees come to ¥2,000 + ¥4,000 = ¥6,000.

Three for three, on the exact yen.

If you live in any of those nine wards — 39% of Tokyo's twenty-three — the "29% OFF" coupon delivers you to the precise number printed on the undiscounted price list. ¥21,000 is ¥21,000. ¥29,000 is ¥29,000. ¥38,000 is ¥38,000. The discount is not reduced or diluted; it is exactly consumed, to the yen, by two fees the badge doesn't mention.

Now, is this a trick? No — and I want to be careful here, because it would be easy and wrong to call it one. A flat ¥6,000 discount meeting flat ¥6,000 of fees is a coincidence of two round numbers, not a scheme; nobody sat down and reverse-engineered the transport table to eat the coupon. And the list price was never the all-in price for anybody, in any zone, coupon or not — a Zone C customer paying list was always going to hand over ¥27,000 for the hour, not ¥21,000.

But the effect on a first-timer is real and worth naming. The number a first-timer anchors on is the sticker price. The number a first-timer expects to save is the badge. And in nine wards, those two things annihilate each other perfectly, so the coupon's practical function is to move you from "list plus fees" back down to "list" — which is a genuine ¥6,000 saved, and is also, precisely, not a discount off the number you were looking at.

The full grid, so you can find your own ward:

Two readings fall out of that table.

One: outside the twenty-three wards, the discounted price exceeds the undiscounted headline. In Zone D at ¥6,000 transport, the coupon 60 costs ¥23,000 all-in against a ¥21,000 sticker. You've used your one lifetime new-customer coupon and paid ¥2,000 more than the price you saw. The 29% badge is, at that address, worth negative money relative to the number it's printed next to.

Two: the inversion inverts back. Remember that the coupon flipped the value curve so shorter was cheaper. Add the fixed fees and it flips a third time — because fixed fees punish short bookings hardest — and the 90 and 120 beat the 60 again in every single zone. Three different orderings of the same three courses, depending on how much of the bill you're honest about:

Only the third one is a price you can actually pay.

The ¥300.00 line

This is the finding I checked four times, and it is the most elegant thing on the page.

Take Zone A — the shop's own home ring, Shinagawa and Minato and Shibuya and Meguro and Chiyoda and Chuo, which is to say the six wards where most of this shop's customers are sleeping. Fixed add-ons: ¥2,000 designation + ¥2,000 transport = ¥4,000. Apply the coupon, then build the board upward using the shop's own ¥9,000 block:

It never breaks. From ninety minutes upward, every course at Shirogane Platinum costs exactly three hundred yen per minute, all-in, in the home zone, for as long as you care to extend it.

The reason is arithmetic rather than genius: the 90-minute coupon course plus fees happens to land on ¥27,000, which is exactly ¥300 × 90, and every subsequent thirty minutes costs ¥9,000, which is exactly ¥300 × 30. Once a line touches ¥300 and continues at slope ¥300, it stays on ¥300. Nobody engineered this. It's what happens when a ¥9,000 block lands on a ¥23,000 anchor with ¥4,000 of fees on top.

But I've been running per-minute arithmetic on Tokyo shops for a year and I have never seen a board resolve this cleanly. Most price lists wobble — they descend, then jump back up at the top course, and I spend a paragraph explaining that the four-hour option is the worst deal on the board. This one is a flat line, and it is flat at the exact number I use as the standard.

Which means the practical advice at this shop reduces to something very short. Above ninety minutes, length is free of consequence. There is no value floor to find, no optimal course, no trap at the top. Book the amount of time you want; the rate is identical. That is a genuinely unusual and genuinely restful thing to be able to say about a price list.

And the 60-minute course, at ¥316.67 all-in, is the only item on the entire board that isn't on the line. It's 5.6% worse than everything above it. The one-hour course is the only mistake available.

What ¥300 a minute buys, and what it doesn't

None of the above means the shop is cheap. It means it is exactly average, all-in, with the one-time coupon applied, in the six wards nearest to it. Take the coupon away — which happens on your second visit, permanently — and the same Zone A board looks like this:

Your second visit costs 17% to 32% more per minute than your first. The one-hour course at ¥416.67 a minute is Roppongi money. The board never gets below ¥333 no matter how long you book, because the ¥9,000 block is ¥300 flat and the fees never quite amortize away.

So the honest summary of the pricing is: Shirogane Platinum is a slightly-above-standard shop that sells one below-standard visit to get you in the door. That is a completely legitimate business model — it is, more or less, how every subscription service on earth works — and it is not what 高級 + ロープライス in the concept text suggests. The low price is a first-date price.

The options, and the absence of a free tier

Five items. Not one of them is free.

I flag this because a free tier is close to standard in this genre — rotor and vibe at ¥0 is the default configuration at most delivery healths I've priced, including shops charging half of what this one charges. Here the entry-level toy costs ¥2,000, which is 9.5% of the 60-minute list course, or — put in the unit that actually stings — eight minutes of your discounted hour. All five together come to ¥11,000, more than half the sticker price of the hour they'd be added to.

There is also no bundling ladder: no course level includes any option, at any length, on either board. The ¥300.00 line I just spent five paragraphs admiring is a line for the service and nothing else.

One asterisk the shop does print, and I'll reproduce it because it's the only caveat on the page:

当日の女の子の体調により、ご対応できない場合もございますので予めご了承ください。

Depending on the woman's condition on the day, we may not be able to accommodate; please understand in advance.

Standard, honest, and worth reading as what it is: options are per-woman and not guaranteed by paying for them. Confirm on the phone before you budget for one.

The points program is a one-year bet

Here is where the listing gets genuinely subtle, and it's in the coupon fine print rather than the coupon.

Every coupon carries the same 利用条件, and it forks:

【ユメオト会員のご新規様】当店をはじめて利用するお客様限定 6000ポイント還元 【ユメオト非会員のご新規様】当店をはじめて利用するお客様限定で総額より6000円割引

If you're a Yumeoto member: 6,000 points returned (還元). If you're not: ¥6,000 off the total, in cash, today.

Separately, the listing advertises 今だけ！ユメオトに登録するだけで5000Pプレゼント — 5,000 points just for registering — at 1 point = 1 yen, valid for one year.

Read those together and the choice is sharper than it looks:

The member pays ¥6,000 more today and walks out holding 11,000 points that expire in twelve months. If you come back inside the year and the points spend at face value, you're ¥5,000 ahead. If you don't come back, you're ¥6,000 down and the points evaporate.

Yumeoto membership is a ¥6,000, one-year bet that you'll return. That's not a criticism — it's a perfectly ordinary loyalty structure and the odds are decent if you liked the visit. But it is a bet, it is made at the moment you register rather than at the moment you book, and absolutely nobody is going to explain it to you in those terms.

Two things the page does not answer, both worth real money, both worth one phone call:

1. Can the 5,000-point signup bonus be spent on the first booking? If yes, the member's day-one cash drops to ¥16,000 and the bet becomes nearly free — ¥1,000 down for 6,000P held. If no, it's the full ¥6,000. The page says 登録するだけで — "just for registering" — and stops.
2. Do points and the new-customer discount stack at all, or does registering simply move you from the cash track to the points track? The 利用条件 wording reads like an either/or, which suggests they don't. But "reads like" isn't good enough when the gap is ¥6,000.

I'm not going to guess at either. Ask before you register, because registering is the irreversible step.

The roster

I pulled the cast page and counted. 62 women listed — a solid book for a single shop, well short of the 選び放題 armies some chains field, and consistent with a shop claiming 厳選 (careful selection) rather than volume.

Ages, tallied:

Range 18 to 30. Median 24. Mean 23.7.

Two things stand out.

The modal age is 25, with fourteen women on it — 22.6% of the entire roster at a single number. That's a sharp spike, and it's the kind of clustering that tells you these are advertised ages rounded to a marketing intuition rather than dates of birth. (For contrast: when I counted a hundred-woman roster in Tachikawa last week, the modal age was 20 and there wasn't a single 29-year-old on the list. Here every age from 18 to 30 is represented without a gap — which, oddly, is the more credible-looking distribution despite the spike.)

Exactly one woman is over 29. The book effectively ends at 29, and 84% of it sits between 21 and 29. This is a shop selling adults rather than youth — the hitozuma shops I've priced skew older, the student-concept shops skew far younger, and this one is deliberately parked in the middle of the twenties. If you came looking for either extreme, it isn't here.

Physical stats, since the listing publishes them:

Nothing anomalous. It's a broad, ordinary distribution centered exactly where the national median sits, which — for a shop whose whole pitch is 厳選されたハイクオリティ, carefully selected high quality — is worth saying plainly. The selection claim isn't visible in the numbers. It may well be visible in person; measurements don't measure the thing anyone is actually buying. But if you were expecting the roster's statistics to look unusual because the copy says the roster is unusual, they don't.

The group

Yumeoto (ユメオト) runs 13 affiliated shops across Tokyo, Kanagawa, Chiba and Saitama — 東京人妻セレブリティ, 品川ミセスアロマ, 錦糸町人妻セレブリティ and others. Note the pattern in those names: hitozuma, mrs, celebrity, aroma. The group's centre of gravity is married-women and esthe concepts, and Shirogane Platinum — filed as スタンダード with a roster medianing at 24 — is the outlier in its own family.

That matters for one practical reason: the points are the group's, not the shop's. A loyalty program spanning thirteen shops in four prefectures is a meaningfully better proposition than one spanning a single Gotanda phone number, because the credit stays useful even if this particular shop turns out not to be for you. If you take the ¥6,000 bet, that's the argument in its favour — you're not betting on Shirogane Platinum, you're betting on Yumeoto.

About the shop

The verdict

Shirogane Platinum is a competently run, slightly-above-average delivery health that has written a very good first-visit offer and a very ordinary second-visit one, and the entire difficulty of reading this listing is that the marketing copy describes the first as though it were the second.

The list board does not support the ロープライス claim: ¥350 a minute at the door, ¥316.67 at best, in a city where ¥300 is standard. The coupon fixes that — once — and does so with a flat ¥6,000 that quietly inverts the value curve, then inverts it back once you add the two fees you cannot avoid. In nine wards those fees are also exactly ¥6,000 and the coupon nets to zero against the sticker price. Beyond the twenty-three wards it nets to negative.

Against all that, the shop does three things I'd single out as straightforwardly good, and none of them are in the marketing: no entry fee, no loyalty premium on repeat designation — which is rarer and more customer-friendly than any coupon on the page — and a dispatch table that names all twenty-three wards instead of hiding behind 要相談. And then, by accident, the cleanest per-minute line I've measured in Tokyo.

What I'd tell a first-timer, in five lines:

1. Find your ward in the transport table before you look at anything else. In Zone C the coupon returns you to exactly the list price; in Zone D you pay above it. The badge says the same 29% in all of them.
2. Book the length you want at the door. On-the-spot extension is ¥10,000 against ¥9,000 booked — you lose ¥1,000 a block, every time, on both boards.
3. Don't book the sixty. In the home zone it's ¥316.67 a minute all-in and everything above it is ¥300.00 flat. It's the only course on the board that isn't on the line, and the 60-to-90 upgrade is the cheapest half-hour the shop sells.
4. Check who the coupon belongs to. There are three, one per course length, each attached to a named woman. If she isn't who you wanted, you're buying off the ¥350 board and none of the arithmetic above applies.
5. Ask two questions before you register: can the 5,000 signup points be spent on the first booking, and do points stack with the new-customer discount? The answers are worth ¥6,000 and the page contains neither.

The shop is named platinum twice, in a town that isn't Shirogane, and prices its front door above the Tokyo average. But scroll to the fine print, find your ward, book ninety minutes or more, and the whole thing settles onto a perfectly flat three hundred yen a minute and stays there as long as you want it to.

Say platinum twice if you like. The line is the line.