Is the OK Prostate Chip discontinued? | Some versions ended; others remain listed [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 "discontinued products and delayed releases" 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

• Some designs were withdrawn after bleeding, pain, breakage, or unresolved testing problems.
• Mr. Okada sometimes offered a different construction, but other projects remained on hold.
• The current list includes resin stoppers and chips despite historical phaseouts and a later production stop.

If you see blood in your urine, even a small amount or for the first time, do not wait and see. See a urologist right away. If you suddenly cannot urinate, or the device cannot be removed, do not try to fix it yourself. Go to a medical facility, including emergency care, immediately.

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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: discontinued prostate chips

The OK Prostate Chip is a small device placed in the urethra to act on the prostate. The discontinued designs discussed here include complete chips, experimental attachments, and cables behind the chip. Some were intended to hold the device in position; others carried electrical current or added vibration. The diary also covers separate anal devices, so a withdrawal notice can concern a different body location or just one component.

Bladder-anchor testing left a delayed release unresolved after bleeding

In an entry published in January 2018, a bladder-anchor prototype failed to stay reliably anchored. A tester reported bleeding while its curved tip passed a sphincter (a muscle controlling urine flow). The tester said the bleeding had stopped by the next urination.

No matching product can be confirmed on the current list. Mr. Okada said further testing was needed before deciding whether to sell that design.

(Source: ok-lab's diary, published January 2018)
https://ok-lab.hatenablog.com/entry/20180111/1515662782

Difficult removal caused a delayed release for hollow chips

An entry published in February 2018 describes Mr. Okada's test of linked hollow chips. After about half a day, removal became difficult enough that he feared the retrieval thread would detach. He eventually removed the chips.

He suspected urine flowing through the hollow centers left the outer surfaces dry and stuck to the urethral wall. No matching product can be confirmed on the current list. Mr. Okada withheld sales pending solutions to surface drying and cleaning difficulties.

(Source: ok-lab's diary, published February 2018)
https://ok-lab.hatenablog.com/entry/20180228/1519809422

A better electrode result still left its release delayed

In an entry published in December 2018, a tester reported stinging from an anal chip with electrodes (electrical contacts for stimulation). Mr. Okada initially stopped development, suspecting the metal and lacking facilities to test electrode materials.

The same tester later reported no stinging with a lower electrode 18mm wide. Mr. Okada still thought different users and contact conditions could produce stinging. No matching product can be confirmed on the current list. At that time, he allowed specified custom builds but withheld regular provision.

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

Repeated pain led to a cancelled release for long tubes

An entry published in April 2022 reports Mr. Okada's repeated discomfort and pain during long silicone-tube tests. He suspected drying and adhesion to the urethral lining, rather than establishing a medical cause.

No matching product can be confirmed on the current list. Mr. Okada decided against selling long-tube products because they could not meet his aim of prolonged wear.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/23/123121

Uneven tubing kept the gripping screw's proposed release delayed

In an entry published in October 2022, Mr. Okada suspended a screw-shaped attachment intended to grip around a sphincter. Tubing with a 1mm outside diameter varied internally despite its specified 0.5mm opening.

He also doubted its durability under repeated 500% stretching. No matching product can be confirmed on the current list. Mr. Okada deferred sales while waiting to see whether suitable tubing could be supplied consistently.

(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/08/122859

A discontinued cable preceded the more flexible floating 4-wire design

Another entry published in October 2022 confirmed the 6-wire cable's sales had stopped. It introduced a floating 4-wire support cable (a connection designed to help hold a chip's position) that bent in all directions.

The published price was ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) tax excluded for up to 10cm. No matching product can be confirmed on the current list. Mr. Okada advised anyone concerned about its risks against purchasing it.

(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/15/123011

A floating-wire prototype broke despite earlier efforts to replace discontinued cables

An entry published in January 2023 records a replacement request for a floating 4-wire urethral sound (a slender device for urethral stimulation). The roughly 6mm prototype had suffered a broken wire at a joint after about 3 weeks of continued use.

The customer proposed shortening its rigid end, but Mr. Okada instead made a jointed 2-wire design without the reinforcing wire. The diary does not record how the replacement felt for that customer. No matching product can be confirmed on the current list. Mr. Okada favored the wire-free construction over merely shortening the old design.

(Source: ok-lab's diary, published January 2023)
https://ok-lab.hatenablog.com/entry/2023/01/21/122941

Heart symptoms and slow production left a vibrator's release delayed

In an entry published in May 2024, Mr. Okada reported sudden heart problems after approximately 5–10 minutes testing a bladder-tip vibrator. He also wrote that making one prototype took about 5 days, preventing a launch without a more efficient method.

No matching product can be confirmed on the current list. Mr. Okada wrote that he would refrain from further use with vibration.

(Source: ok-lab's diary, published May 2024)
https://ok-lab.hatenablog.com/entry/2024/05/11/122910

Unavailable materials caused a production stop for blue resin chips

In an entry published in April 2026, the production partner reported that necessary blue-chip materials could no longer be obtained. Manufacturing stopped, and Mr. Okada expected some products to run out of stock. The diary does not record whether manufacturing subsequently resumed.

(Source: ok-lab's diary, published April 2026)
https://ok-lab.hatenablog.com/entry/2026/04/25/122914

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The maker's answer to discontinued prostate chips

The maker sometimes replaced a withdrawn specification, while other changes depended on testing or remaining stock.

An 8-hole stopper replaced a discontinued specification at the previous price

An entry published in August 2021 announced an 8-hole sphincter stopper in biocompatible resin (the maker's resin for body contact). Its price was ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) tax excluded, and it combined the previous 3-hole and 6-hole functions.

The former 6-hole stopper was discontinued. Mr. Okada directed customers needing a dedicated 3-hole design to the older resin version.

(Source: ok-lab's diary, published August 2021)
https://ok-lab.hatenablog.com/entry/2021/08/28/125823

A planned resin phaseout kept old prices unchanged during replacement

An entry published in November 2024 announced that old-material chips would be discontinued when existing stocks ran out. Those remaining chips would retain their prices, while second-generation models would arrive gradually at new prices.

The first production batch received was the second-generation semi-long M chip. Mr. Okada invited enquiries about that newly arrived batch.

(Source: ok-lab's diary, published November 2024)
https://ok-lab.hatenablog.com/entry/2024/11/09/122930

The retired connection specification prompted a prototype with reinforcing wire

An entry published in January 2026 records a customer's request for an old angled nylon connection. OK Lab said that specification was effectively discontinued: its soft core was unstable, rubber peeled, and angles were difficult to maintain.

Mr. Okada made a prototype using shape-memory wire (wire that returns toward its set shape), adding ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) tax excluded. The diary does not record whether the customer's order was completed. No matching product can be confirmed on the current list. OK Lab asked the customer to confirm how the order should proceed.

(Source: ok-lab's diary, published January 2026)
https://ok-lab.hatenablog.com/entry/2026/01/24/122909

If you see blood in your urine, even a small amount or for the first time, do not wait and see. See a urologist right away. If you suddenly cannot urinate, or the device cannot be removed, do not try to fix it yourself. Go to a medical facility, including emergency care, immediately.

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How discontinued prostate chips changed over time

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OK Prostate Chip products related to discontinued prostate chips

The current list includes products involved in these changes; listed prices do not establish that manufacturing has resumed.

Products that appear in these entries

(Source: ok-lab's diary, published August 2021)
https://ok-lab.hatenablog.com/entry/2021/08/28/125823

(Source: ok-lab's diary, published November 2024)
https://ok-lab.hatenablog.com/entry/2024/11/09/122930

Products the diary mentioned as alternatives

(Source: ok-lab's diary, published August 2021)
https://ok-lab.hatenablog.com/entry/2021/08/28/125823

(Source: ok-lab's diary, published November 2022)
https://ok-lab.hatenablog.com/entry/2022/11/19/122516

For historical prototypes and custom builds named in the timeline: No matching product can be confirmed on the current list.

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Common worries about discontinued prostate chips

A delayed release, a held order, and an unavailable old construction received different answers in the diary.

"When will the anal chip's delayed release finally happen?"

In an entry published in October 2018, readers asked when the anal chip would be released. Mr. Okada reported bleeding during his tests and an examination that had not identified its cause.

The release was postponed indefinitely. No matching product can be confirmed on the current list. Mr. Okada said sales must wait until the cause was understood and his use could be confirmed not to cause bleeding.

(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181013/1539409481

"Was my request refused because of a discontinued cable?"

In an entry published in June 2022, a customer asked why their custom request appeared to have been refused. Mr. Okada said everyone's pending cable requests had been held for a design announcement.

The standard 4-wire cable was discontinued after a pain report. The Super 4-wire name was retired: 6-wire kept the previous 4-wire price, while Super 6-wire appeared separately. He still accepted exceptional 4-wire requests, but warned that repeated extreme bending would cause breakage. Mr. Okada asked customers to reconsider their requests after reviewing the new choices.

(Source: ok-lab's diary, published June 2022)
https://ok-lab.hatenablog.com/entry/2022/06/11/123420

"Can a discontinued cable still power independently controlled motors?"

An entry published in August 2023 records a request for an older 3-motor arrangement with separate control. OK Lab replied that its Super 6-wire construction had been discontinued because of durability problems, making that arrangement unavailable.

The diary does not record whether the customer ordered a different arrangement. No matching product can be confirmed on the current list. Mr. Okada mentioned separate devices with finer nylon-reinforced cables as a possible alternative.

(Source: ok-lab's diary, published August 2023)
https://ok-lab.hatenablog.com/entry/2023/08/19/123214

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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.