Chip slips every time you pee? | The diary reports movement and tradeoffs [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 entries about the topic “pushing the chip back after every urination” 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

Customers and Mr. Okada reported chips moving during urination, sometimes followed by pain during repositioning.

Mr. Okada proposed support parts and cautioned against forcing a chip that resisted movement.

The current list includes a screw-shaped auxiliary option priced at ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04) including tax.

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: chip slipping when peeing

The OK Prostate Chip is a small device placed in the urethra (urine passage) to stimulate the prostate. This topic concerns outward movement during urination and difficulty returning the chip to its earlier position. The diary discusses support parts intended to limit movement, including components behind the main chip near the penis base. These accounts include customer questions, Mr. Okada’s tests, and changes intended to address movement or discomfort.

Chip slipping can expose a sharp thread junction during repositioning

In an entry published in August 2020, a customer reported sharp resin on the retrieval thread (cord intended for retrieval) of a curved Version 4 chip. They noticed the defect before insertion and believed it could otherwise have caused severe pain or bleeding. Their message did not report that those injuries actually happened.

Mr. Okada acknowledged difficulty finishing the narrow rear connection and said similar complaints had continued. His response was to make rubber covers standard in principle at thread connections on Version 4 and two-thread chips.

(Source: ok-lab's diary, published August 2020)
https://ok-lab.hatenablog.com/entry/2020/08/08/130037

Preventing chip slipping came with prolonged leakage in a horn prototype

In an entry published in November 2020, Mr. Okada described prototype 4, which directly joined a horn extension (flexible rear projection) to a stopper. This was a sphincter stopper (a part intended to limit inward movement), and he reported that the arrangement stayed still during urination. After about 10 hours, however, he experienced slight urine leakage lasting about 1 day.

He suspected muscle fatigue or injury; the entry does not establish a medical diagnosis. Mr. Okada warned that the direct connection could place excessive strain on the muscle.

(Source: ok-lab's diary, published November 2020)
https://ok-lab.hatenablog.com/entry/2020/11/07/121125

Repeated repositioning after peeing became painful around the fourth day

In an entry published in April 2022, a customer described pain developing around day 4 after repeated repositioning of stainless and blue resin chips. They suspected rubbing at the external urethral sphincter (a muscle involved in urine control). They wanted connected screw-shaped parts because their preferred short resin twist chip also caused pain at its central edge.

Mr. Okada agreed that different sizes and a cable connection were possible. The customer paid an additional ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) for a 30mm connection combining cable and thread. He offered that custom arrangement, but the diary does not record how the finished pair felt in use.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/30/123451

A ceramic prototype still showed chip slipping despite its retaining loops

In an entry published in January 2025, Mr. Okada compared a ceramic prototype supported by loops with a similarly sized wire-only design. He reported about 2 days of testing for the ceramic version, compared with roughly 3 weeks for the wire-only version. The ceramic version moved outward about 1cm during urination or exercise, although he said it did not come out.

He considered its position less stable than the wire-only design and suspected the ceramic’s weight and smoothness contributed. Mr. Okada presented the ceramic version as an option for someone who found the wire-only version’s stimulation too mild.

(Source: ok-lab's diary, published January 2025)
https://ok-lab.hatenablog.com/entry/2025/01/04/122911

A detached stopper limited chip slipping but made removal difficult

In an entry published in December 2025, Mr. Okada tested prototype 1 with a detached apple-shaped stopper (a looped wire support). He reported slight movement during urination, without the chip leaving the prostate region. Both detached and integrated versions were priced at ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) excluding tax in that entry.

He described difficult removal, citing movement of only about 1cm in 10 seconds. The designs depended on a retrieval thread extending outside the penis. Mr. Okada described the detached arrangement as offering less strain and comparatively easier removal because its angle could change.

(Source: ok-lab's diary, published December 2025)
https://ok-lab.hatenablog.com/entry/2025/12/20/123000

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The maker's answer to chip slipping when peeing

Mr. Okada explored different stops and supports, but firmer holding sometimes came with discomfort or difficult removal.

A screw-shaped auxiliary part addressed chip slipping through added support

In an entry published in November 2019, Mr. Okada introduced a screw-shaped auxiliary chip (an additional part behind the main chip). He described it as helping retain the device during urination, limiting further outward travel, and supporting repositioning. Standard dimensions were 15-18mm long and 8-9mm wide, with a proposed price of ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) excluding tax.

The entry also said lengths of 15mm or less could not be made. Mr. Okada specified ordering it together with the main product because it could not be added afterward.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/16/154802

Wing attachments reduced chip slipping without preventing every outward movement

In an entry published in September 2025, Mr. Okada tested wing attachments (looped wire parts for retention) on a short stainless chip. He reported roughly 20 hours of retention, although forceful urination still caused some downward movement. The attachment therefore did not eliminate the movement described in his account.

Wings up to 40mm cost ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) excluding tax, with another ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) excluding tax for mandatory wire attachment along the chip. Mr. Okada recommended approximately 25mm as the wing size he considered easier to accommodate.

(Source: ok-lab's diary, published September 2025)
https://ok-lab.hatenablog.com/entry/2025/09/27/123018

An integrated stopper prevented chip slipping in one test, with reservations

In an entry published in December 2025, Mr. Okada described prototype 3, a slim curved ceramic chip with an integrated apple-shaped stopper. He reported no outward movement during urination and no unwanted deeper movement toward the bladder. Unlike the detached arrangement, this design fixed the relationship between the chip and its stopper.

He described that fixed relationship as providing nearly complete retention in his test. Mr. Okada nevertheless cautioned that an integrated arrangement could strain the urethra, depending on its position.

(Source: ok-lab's diary, published December 2025)
https://ok-lab.hatenablog.com/entry/2025/12/20/123000

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 chip slipping when peeing changed over time

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OK Prostate Chip products related to chip slipping when peeing

The current list includes the screw-shaped auxiliary option and models mentioned in customers’ reports.

Products that appear in these entries

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/09/132111

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/30/123451

Products the diary mentioned as alternatives

(Source: ok-lab's diary, published June 2019)
https://ok-lab.hatenablog.com/entry/2019/06/01/155432

The diary also describes historical custom builds, reverse-curved chips, horn extensions, loop-supported prototypes, wing attachments, and apple-shaped stoppers. No matching product can be confirmed on the current list.

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Common worries about chip slipping when peeing

The diary addresses movement, resistance, and alternative shapes, but several customer outcomes remain unrecorded.

"Is repositioning after peeing hygienic if the chip stayed inside?"

In an entry published in January 2019, a customer asked about a two-chip model moving outward until an auxiliary part stopped it. Mr. Okada considered that stopping point expected and expressed the opinion that repositioning entirely within the urethra posed no hygiene problem. The diary provides no health follow-up for this customer.

The customer also asked whether a brief, distinctive sensation identified the chip’s position. Mr. Okada suspected passage through the internal urethral sphincter and interpreted further inward travel as possible movement into the bladder. For that inward movement, he recommended a sphincter stopper.

(Source: ok-lab's diary, published January 2019)
https://ok-lab.hatenablog.com/entry/20190112/1547275441

"Can a semi-long design prevent chip slipping when peeing?"

In an entry published in September 2019, a customer asked about urination after successfully positioning a semi-long vibrating chip. Mr. Okada’s reply focused on its accessible rear section as a support point. He still anticipated some outward movement and thought the chip could return to position afterward.

The diary does not record whether that customer achieved the longer retention they wanted. Mr. Okada also suggested longer curved shapes, while acknowledging that their size could be difficult for some customers.

(Source: ok-lab's diary, published September 2019)
https://ok-lab.hatenablog.com/entry/2019/09/21/131939

"Would a longer model prevent chip slipping when peeing?"

In an entry published in November 2019, a customer wanted longer retention after a single glass chip moved out during urination. Mr. Okada suggested longer, curved, or connected designs, but said he expected some downward movement with any chip during natural urination. He attributed this to the urethral sphincter opening.

His answer treated repositioning as something that might still be necessary, rather than promising a model that would remain fixed. He also considered dryness a possible reason for resistance and did not insist on an immediate complete return. Mr. Okada cautioned against force when movement was difficult.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/09/132111

"Why won't the chip go back after peeing?"

In an entry published in June 2024, a customer asked why a reverse-curved chip had passed the muscle only once. Mr. Okada suspected insufficient moisture and resistance from the urethral lining, which he thought could bend the wire instead of moving the chip. He connected that explanation with his own episodes of difficulty repositioning a chip after urination.

The diary does not record whether the customer’s difficulty was resolved. Mr. Okada’s proposed measure focused on lubrication, although the explanation remained his interpretation.

(Source: ok-lab's diary, published June 2024)
https://ok-lab.hatenablog.com/entry/2024/06/29/123044

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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.