Is the chip I want custom-only? | Availability depends on the version [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 "custom orders and regular sales" 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

• Custom-only status has covered unfinished designs, difficult manufacturing, and products withdrawn from regular sale.
• Mr. Okada sometimes accepted individual requests while delaying, limiting, or stopping wider sales.
• The current list includes resin screw and stainless chips, but does not confirm every historical custom design.

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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: custom orders and regular sales

The OK Prostate Chip is a small device placed in the urethra to act on the prostate. A custom order is an individually requested version, sometimes involving a special shape or an added part. These requests have covered the chip itself, connections between chips, and controllers (units that control vibration) for motorized models. The diary distinguishes these arrangements from products offered through the company's own online store as regular items.

Custom orders initially carried higher prices, but July brought a reduction

In the entry published on July 7, 2018, screw chips were custom-only. Their initial prices were ¥9,000 (about $58 at ¥156 = $1, rate as of 2026-09-04) for glass and ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) for resin, excluding tax, under a pricing rule charging three times the standard price.

An entry published on July 21, 2018, replaced that rule with prices of ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) for glass and ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) for resin, excluding tax. Mr. Okada attributed the reduction to growing confidence in production. He still asked buyers to request custom orders and warned that delivery could take considerably longer.

(Source: ok-lab's diary, published July 2018)
https://ok-lab.hatenablog.com/entry/20180707/1530947332

(Source: ok-lab's diary, published July 2018)
https://ok-lab.hatenablog.com/entry/20180721/1532152353

Regular sales excluded the glass screw while glass twisting became cheaper

In an entry published in August 2018, Mr. Okada removed the glass short screw from the product list. Custom production remained possible, with a ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) screw-processing fee.

Separately, he reduced glass twisting charges from ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) to ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04), while resin twisting remained ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) per chip. He wrote that glass twisting had become more accurate, whereas resin work remained time-consuming. For the withdrawn glass screw, no matching product can be confirmed on the current list. Mr. Okada directed requests for products awaiting their planned online release to email.

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

Regular sales reduced custom requests for resin screws and curved chips

In an entry published in September 2018, resin screw chips and semi-long curved twisted chips had already entered regular sales. Mr. Okada wrote that this reduced the number of orders handled as custom work. He omitted that week's usual custom-order report because the remaining requests had not involved unusual sizes.

(Source: ok-lab's diary, published September 2018)
https://ok-lab.hatenablog.com/entry/20180922/1537592180

Custom-only electrode chips followed an unresolved concern about tingling

In an entry published in December 2018, a customer reported tingling from an anal chip with electrodes (metal contacts for electrical stimulation). Mr. Okada initially suspected the contact material and stopped development. The customer disputed that explanation and later reported no tingling with an 18 mm lower electrode.

Mr. Okada nevertheless suspended general supply because he thought results could vary with the user and contact conditions. No matching product can be confirmed on the current list. His final position allowed only custom builds made to the buyer's specified instructions.

(Source: ok-lab's diary, published December 2018)
https://ok-lab.hatenablog.com/entry/20181215/1544857573

Custom orders became cheaper when electrode production became less demanding

In an entry published in March 2019, a reader asked whether electrode chips were available beyond the original customer's commission. Mr. Okada agreed, distinguishing research samples matching his testing plans from paid custom requests.

He reduced tax-excluded charges for 1 electrode per chip from ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) to ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04), and 2 electrodes from ¥8,000 (about $51 at ¥156 = $1, rate as of 2026-09-04) to ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04). He attributed the reduction to a less demanding production approach, while acknowledging a less tidy appearance. His reply offered custom production for requests outside his research plans.

(Source: ok-lab's diary, published March 2019)
https://ok-lab.hatenablog.com/entry/2019/03/16/165528

Regular sales of the connected ceramic pair waited for further testing

In an entry published in November 2019, Mr. Okada revised a connected ceramic pair (Rei) after seeking specialist advice. He made its curve gentler and offered 2 spacing arrangements, closer together or slightly farther apart. He withheld regular sales because he had not tested the design sufficiently to satisfy himself.

No matching product can be confirmed on the current list. Mr. Okada directed interested buyers to the custom-order arrangement described in that entry.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/02/132358

Regular sales expanded to curved twisted chips and ceramic anal models

In an entry published in December 2019, Mr. Okada confirmed another move into regular sales. The announcement covered curved twisted chips (Cobra Twist). Ceramic anal chips were included in the same launch announcement.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/21/150646

Regular sales remained conditional after a limited stainless trial ended

An entry published in August 2022 announced a trial sale of 14 semi-long stainless chips in size M. The provisional price was ¥9,000 (about $58 at ¥156 = $1, rate as of 2026-09-04) excluding tax, pending fuller production-cost assessment. An update recorded that the trial ended on August 23, 2022.

Mr. Okada described wider sales as conditional on further production and satisfactory results, without a firm launch date. At the trial's opening, he directed enquiries to email and limited purchases to the available stock.

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/20/122920

Custom orders by email let stainless sales begin before assembly stabilized

In an entry published in July 2023, Mr. Okada opened email reservations for the full stainless range pictured in the diary. He wrote that difficulty attaching thread still made reliable completion uncertain. Customers would receive confirmation after their requested item was completed, with payment requested afterward.

The updated entry also said reservation acknowledgements would be sent by email. He planned ordinary shopping-cart sales once thread attachment became sufficiently consistent. Meanwhile, he asked buyers to reserve through email.

(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/08/122632

Custom orders for micro wire designs stopped when production became impractical

In an entry published in August 2026, Mr. Okada suspended new requests for miniature wire designs (Micro Gejigeji and Micro Skyfish). He described difficulty reproducing delicate work involving 0.03 mm and 0.04 mm wire after a break in production. He intended to complete orders already accepted and considered making batches for possible future stock sales.

No matching product can be confirmed on the current list. His notice asked customers to accept a temporary halt to new custom requests.

(Source: ok-lab's diary, published August 2026)
https://ok-lab.hatenablog.com/entry/2026/08/08/122906

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The maker's answer to custom orders and regular sales

Mr. Okada used limited orders, further testing, and narrower specifications to manage products that were not ready for unrestricted sales.

Custom orders kept the rechargeable controller separate from a regular launch

In an entry published in December 2019, Mr. Okada introduced a rechargeable vibration controller at ¥2,500 (about $16 at ¥156 = $1, rate as of 2026-09-04) excluding tax. He kept it custom-only because reliable supplies of its parts were uncertain.

No matching product can be confirmed on the current list. Mr. Okada asked buyers to identify the rechargeable version in their order comments.

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

Custom orders tested tube connections before their planned adoption as standard

In an entry published in August 2022, Mr. Okada described a tube spring (a flexible connection intended to straighten after bending). It joined the main chip to a screw-shaped auxiliary chip, an additional twisted piece intended to help maintain position. The change carried no additional charge, and he planned to make it standard after testing.

The stated spacing range was 2 mm–6 mm; 0 mm left no room for the tube. At publication, the change was available on request. Although he would consider gaps up to 10 mm, he did not recommend or guarantee the untested longer arrangements.

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/27/123001

Regular sales of one reinforced ceramic design depended on advance stock

In an entry published in August 2026, Mr. Okada proposed regular sales of a ceramic assembly with shell-like raised reinforcement. He limited the initial offering to the semi-long twisted S size, intending to prepare about 5 units before launch. He hoped batch production would permit a price approximately ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) below the custom version.

No matching product can be confirmed on the current list. Mr. Okada directed requests for stronger versions to custom ordering.

(Source: ok-lab's diary, published August 2026)
https://ok-lab.hatenablog.com/entry/2026/08/22/122905

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How custom orders and regular sales changed over time

For that proposed ceramic model, the latest entry still described a future launch. The diary does not say what the current state is.

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OK Prostate Chip products related to custom orders and regular sales

The current list includes the following models, but it does not confirm the availability of historical custom specifications.

Products that appear in these entries

The resin screw chip has a listing on OK Lab's official store.

The semi-long stainless chip has a listing on OK Lab's official store.

The stainless Zoro chip has a listing on OK Lab's official store.

(Source: ok-lab's diary, published September 2018)
https://ok-lab.hatenablog.com/entry/20180922/1537592180

(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/08/122632

(Source: ok-lab's diary, published April 2026)
https://ok-lab.hatenablog.com/entry/2026/04/04/122916

Products the diary mentioned as alternatives

The diary names no alternative.

Past catalogue withdrawals included the glass short screw in August 2018 and the earlier linked pair discussed in March 2019. Those entries still allowed custom requests.

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Common worries about custom orders and regular sales

The replies distinguish a possible custom build from a confirmed launch, a durability claim, or an accurate stock notice.

"Do custom orders come with a known resin-chip lifespan?"

In an entry published in March 2019, a customer asked about resin-chip lifespan and detached threads. Mr. Okada said he had no lifespan statistics. He explained that the repair example involved an earlier linked pair withdrawn from regular sale because leverage between chips could overload the thread.

Custom requests for that design were still accepted. No matching product can be confirmed on the current list. Mr. Okada cautioned that few resin repair requests did not establish greater durability, since customers might replace broken items instead.

(Source: ok-lab's diary, published March 2019)
https://ok-lab.hatenablog.com/entry/2019/03/23/173222

"Were detachable plugs available through custom orders before regular sales?"

In an entry published in September 2019, a customer wanted a vibrating chip with a detachable plug before its formal release. Mr. Okada offered the modification for an additional ¥2,160 (about $14 at ¥156 = $1, rate as of 2026-09-04) while the sales arrangement remained under consideration. The customer then ordered a plugged version with different controller options.

The diary does not record how the finished device felt in use. No matching product can be confirmed on the current list. Mr. Okada generally advised against placing these plugs inside the urethra because their hollow interiors were difficult to clean.

(Source: ok-lab's diary, published September 2019)
https://ok-lab.hatenablog.com/entry/2019/09/07/135854

"Did sold-out notices also rule out stainless custom orders?"

In an entry published in April 2026, a reader reported that stock notices were misleading prospective stainless-chip buyers. OK Lab's staff acknowledged an outdated notice and removed sold-out labels for the semi-long and Zoro models. The reply therefore concerned the store's displayed information, rather than a newly announced product.

Mr. Okada thanked the reader for raising the problem. He directed enquiries about other stainless models to email, as before.

(Source: ok-lab's diary, published April 2026)
https://ok-lab.hatenablog.com/entry/2026/04/04/122916

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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.