How much does an anal chip cost? | Material and custom size change the price [OK Prostate Chip]

This page is based on entries from "ok-lab's diary" (https://ok-lab.hatenablog.com/), the Japanese development diary written by Mr. Okada, founder of OK Lab, a small company in Japan (Okada Comfortable Life Laboratory). Only the entries about "anal chip prices and custom sizes" are summarized here, in order of publication. Past prices and sizes are as written at the time. Current prices come from the official product list (retrieved September 4, 2026). Quotations are translated from Japanese.

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Note: This page is a personal reading log by someone with no connection to the maker or the seller. It reflects the source entries as of their publication dates and makes no guarantee of accuracy or safety. The product is not a medical device; talk to a doctor about any health decision. Check the official site for current information. This page contains advertising.

In short

Anal chip prices depend on material, shape, and the amount of material needed for custom sizes.

Mr. Okada quoted extensions separately and sometimes declined shapes he could not manufacture.

The current list includes resin and ceramic anal chips, but does not establish availability of historical custom specifications.

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About this product

The OK Prostate Chip is a small device that is placed in the urethra (the urine passage) so that it acts on the prostate; the maker sells it in several shapes, sizes and materials. It is made and sold by OK Lab (Okada Comfortable Life Laboratory), a small company in Japan, through its own online store, and prices are in Japanese yen (JPY). The maker's development diary, "ok-lab's diary", is written in Japanese. This page is an English summary of it, and every quotation is translated. OK Lab ships internationally, so readers outside Japan can order (see "Buying from outside Japan" below). Product names on this page are plain-English descriptions. The official Japanese product name is shown once in the product table so you can find the same item in the store.

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Before you read: key terms

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What happens: anal chip prices and custom sizes

The OK Prostate Chip is a small device placed in the urethra to act on the prostate. The related anal chips go in the rectum, where the maker intends them to press on the prostate from the bowel side. Custom sizes concern the length, width, and curves of the part positioned inside the body. The diary describes resin, ceramic, and silicone-covered designs, with separate prices or limits for custom work.

The first anal chip price included an offer of custom lengths

An entry published in August 2018 announced an anal chip at ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) excluding tax, with length specified through a custom order. Mr. Okada also described custom curves as a way to make a design suited to an individual body. He directed requests for particular lengths and curves to custom ordering.

(Source: ok-lab's diary, published August 2018)
https://ok-lab.hatenablog.com/entry/20180825/1535182626

Difficult custom anal chip designs could cost ¥10,000 (about $64 at ¥156 = $1, rate as of 2026-09-04) or more

In an entry published in October 2018, Mr. Okada expected difficult designs to cost ¥10,000 (about $64 at ¥156 = $1, rate as of 2026-09-04) or more. He said every anal chip contained stainless-steel wire because he believed these devices faced substantial forces. Despite that reinforcement, he cautioned that forceful bending could crack the resin.

(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181005/1538740535

Loop-ended anal chip sizes had a stated reference price

An entry published in November 2018 announced a loop-ended design approximately 11cm long, with widths of 3cm, 4cm, or 5cm. Its downward depth was 3cm, and the 4cm width was the reference for a price of ¥7,000 (about $45 at ¥156 = $1, rate as of 2026-09-04) excluding tax. Mr. Okada directed requests outside those specifications to custom ordering.

(Source: ok-lab's diary, published November 2018)
https://ok-lab.hatenablog.com/entry/20181123/1542963370

A replacement report raised breakage concerns alongside anal chip prices

A separate report in an entry published in February 2019 describes a reinforced replacement sent after repeated chip breakage. The customer liked the replacement and described using it with its curve reversed. The diary does not record how long it lasted.

Mr. Okada replied that reversed positioning could make withdrawal difficult. He suspected tension on the retrieval thread (the withdrawal cord) could peel resin away and accelerate damage.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

Ceramic anal chip prices differed by the shape offered

An entry published in December 2019 priced the one-bump ceramic U-turn at ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) excluding tax and the two-bump version at ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) excluding tax. The free-design ceramic shapes were each ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) excluding tax. Their initial lengths were 11cm, 10cm, 9cm, and 8cm, with thickness around 10mm. Mr. Okada said specifications beyond those initial designs required separate custom pricing.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/07/162608

Silicone-covered anal chip prices separated the body from suspension cords

An entry published in September 2022 priced the plain silicone-covered aluminum model at ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) excluding tax. Suspension cords (external supporting cords) added ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) excluding tax. The stated rectal lengths were 80mm for M, 70mm for S, and 90mm for L. Mr. Okada said he was reluctant to accept larger custom sizes because they required substantially more physical work.

(Source: ok-lab's diary, published September 2022)
https://ok-lab.hatenablog.com/entry/2022/09/10/122847

Large loop anal chip prices included separate charges at both ends

An entry published in July 2025 described larger loop devices for rectal or vaginal use, using 4mm tubing and 0.4mm wire. The basic shaft with end loops cost ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) excluding tax. The published double-loop breakdown was ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) × 2 = ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) extra, giving the stated price of ¥9,000 (about $58 at ¥156 = $1, rate as of 2026-09-04) excluding tax.

An extra wire cost ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) excluding tax, while the single-loop version cost ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) excluding tax. Mr. Okada suggested single loops for gentler use, but warned this untested version might fall out under a tail's weight.

(Source: ok-lab's diary, published July 2025)
https://ok-lab.hatenablog.com/entry/2025/07/19/122907

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The maker's answer to anal chip prices and custom sizes

Custom pricing depended on manufacturing limits as well as the requested dimensions.

Longer custom anal chips sometimes required a thinner design

An entry published in October 2018 described standard products designed around coverage by a single condom. Mr. Okada said some thicker or longer custom requests could only be made in thinner material as a safety measure. He also stated that extra length or diameter would incur additional charges.

(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181031/1540960147

Resin anal chip extensions were priced by the unbent strip

In an entry published in November 2018, custom pricing followed the resin strip (the material before shaping), rather than the finished device's length. Each extra 1cm of resin strip added ¥350 (about $2 at ¥156 = $1, rate as of 2026-09-04). The described starting strips were 10–13mm wide and 4–5mm thick.

Published strip lengths were about 14cm for the one-bump U-turn, 17cm for the two-bump U-turn, and 23cm for the spiral. Mr. Okada invited line drawings of requested designs that could be formed from such a strip.

(Source: ok-lab's diary, published November 2018)
https://ok-lab.hatenablog.com/entry/20181123/1542963370

Custom ceramic anal chip prices required an individual quote

An entry published in December 2019 put custom ceramic work at at least ¥10,000 (about $64 at ¥156 = $1, rate as of 2026-09-04). Mr. Okada explained that materials for making the mold could cost as much as a finished product. Three-dimensional custom designs would cost more still. He said custom ceramic requests would receive individual estimates.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/07/162608

Silicone anal chip testing revealed a remaining staining problem

In an entry published in September 2022, Mr. Okada reported yellow staining on the silicone-covered aluminum model during further testing. He found that stool could adhere under some conditions, and the staining did not come off easily through boiling alone. He had not established the cause and said he would test other ways of addressing it.

(Source: ok-lab's diary, published September 2022)
https://ok-lab.hatenablog.com/entry/2022/09/17/123057

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How anal chip prices and custom sizes changed over time

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OK Prostate Chip products related to anal chip prices and custom sizes

The current list confirms these product prices, but provides no size options.

Products that appear in these entries

(Source: ok-lab's diary, published November 2018)
https://ok-lab.hatenablog.com/entry/20181123/1542963370

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/07/162608

(Source: ok-lab's diary, published February 2026)
https://ok-lab.hatenablog.com/entry/2026/02/07/122919

Products the diary mentioned as alternatives

The diary names no alternative.

Historical or custom items discussed here include the length-specified launch model, reinforced replacement, breakage-prone stopper, enlarged spiral, and enlarged electrode. They also include the ceramic free-design shapes, silicone-covered aluminum model, and large loop device. No matching product can be confirmed on the current list.

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Common worries about anal chip prices and custom sizes

The diary's replies distinguish a price quote from a confirmed result or a known strength limit.

"What would a wider spiral anal chip cost?"

In an entry published in February 2019, a customer requested a spiral enlarged from 35mm to 50mm. Mr. Okada replied that its base strip would grow from about 23cm to about 30cm, adding ¥2,500 (about $16 at ¥156 = $1, rate as of 2026-09-04) excluding tax. The diary does not record whether the quoted order was completed. Mr. Okada cited a separate report of a crushed 10cm spiral and could not establish the maximum size the structure could withstand.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

"Did chip breakage reports lead to stronger stoppers?"

An entry published in February 2019 also records a separate customer requesting better strength checks after a stopper broke before use. The diary does not record whether this stopper belonged to an anal chip.

Mr. Okada acknowledged repeated breakage reports and said he had considered stopping sales. Sales continued because sales staff objected to withdrawing the cheaper option. He said stronger construction appeared to require a different resin, with no solution yet in prospect.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

"Can a custom anal chip electrode be wider?"

In an entry published in July 2025, a customer requested a 50mm-wide loop-ended electrode (a part carrying electrical current). Mr. Okada initially thought it possible, then declined because the cord's resin covering could not be completed after final shaping. The customer proposed removing the folded-back section, and Mr. Okada accepted that revised design.

The diary does not record whether the revised device was completed or how it felt in use. His charge depended on length before bending, adding ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) excluding tax per 20mm. Mr. Okada invited custom requests from customers seeking more width than the standard 30mm electrode.

(Source: ok-lab's diary, published July 2025)
https://ok-lab.hatenablog.com/entry/2025/07/19/122907

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Buying from outside Japan

OK Lab ships internationally to countries covered by Japan Post's EMS courier service. Overseas orders are paid in advance by PayPal. Each order carries a ¥400 (about $3 at ¥156 = $1, rate as of 2026-09-04) handling fee, and EMS shipping is charged on top. These terms come from OK Lab's official sales-terms page (written here as plain text, not a link: ok-lab.net/docs/law), checked on September 7, 2026; confirm them on the official store before you order, because they can change.

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Summary of this article

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Source: ok-lab's diary (Okada Comfortable Life Laboratory). The original entries are in Japanese; quotations on this page are translated. Photos and videos are on the original entries.