Prostate chip comes out when peeing | Both slipping and complete ejection are reported [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 (Okada Comfortable Life Laboratory). Only the entries about "chips falling out when peeing" 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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This article is about chips falling out when peeing, and summarizes reported problems, support designs, and changes over time. It discusses current products, common worries, medical care, and buying from outside Japan.

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

Chips can shift during urination, come out completely, or strike the toilet.

OK Lab, a small company in Japan, discusses support designs, with results that depend on the device and person.

Current listings include screw-shaped supports and a guard intended to prevent chips reaching the toilet.

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: chips falling out when peeing

The OK Prostate Chip is a small device placed inside the urethra to provide direct stimulation around the prostate. The worry here is movement during urination, ranging from a shift inside the body to the whole chip coming out. The diary describes additional supports and stoppers attached to a chip, its thread, or its cable, intended to limit that movement. Some sit within the urine passage; others form part of an external stopping arrangement.

A beginner reported the entire chip coming out during urination

In an entry published in October 2017, a staff member new to the device reported sudden, complete ejection while urinating. Every chip came out almost instantly, and the assembly nearly fell into the toilet. Catching the thread's end-piece prevented the loss. Mr. Okada says he cannot provide suitable beginner guidance from memory.

(Source: ok-lab's diary, published October 2017)
https://ok-lab.hatenablog.com/entry/20171019/1508375473

A ceramic chip falling out shattered against the toilet bowl

In an entry published in October 2019, a customer compared a short ceramic chip with a single-chip resin screw model. The customer found the screw version easier to urinate with, while straining could expel the short chip. In the reported accident, the ceramic chip struck the toilet and broke in half.

Mr. Okada said that week's revised ceramic chips were considerably stronger. He cautioned that impact resistance depended on where the chip was struck and that comparative testing was limited.

(Source: ok-lab's diary, published October 2019)
https://ok-lab.hatenablog.com/entry/2019/10/05/141806

Changing the neck did not eliminate chip slipping during tests

In an entry published in May 2021, Mr. Okada compared resin prototypes with neck grooves (narrow sections) of different lengths. That groove affected how the urethral sphincter (the muscle closing the urine passage) held the chip, according to his discussion. He reported that strong urination displaced every shape tested. His conclusion was that none of these shapes provided certain retention.

(Source: ok-lab's diary, published May 2021)
https://ok-lab.hatenablog.com/entry/2021/05/22/125847

Chip slipping during urination preceded hospital removal of overlapping pieces

In an entry published in August 2022, a customer described a linked resin chip that became stuck after shifting during urination. Attempts to restore its position preceded the main and auxiliary chips becoming wedged together; hospital examination found them overlapping. Medical removal took place on day 5, costing about ¥8,000 (about $51 at ¥156 = $1, rate as of 2026-09-04) with insurance coverage.

The customer reported some bleeding and pain afterward, plus concern about possible lasting changes to urination. Mr. Okada acknowledged the risks of linked pieces and discussed possible rotation and tangled thread. His reply emphasized checking the device's changed shape or position after unsuccessful repositioning.

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

A flexible prototype still showed chip slipping during urine flow

In an entry published in March 2024, Mr. Okada tested a flexible prototype made from elastomer (a soft, bendable material). He had expected its less slippery surface to improve retention. Instead, it shifted and moved partly outward during the second urination. He said the design still needed substantial improvement and might be far from sale.

(Source: ok-lab's diary, published March 2024)
https://ok-lab.hatenablog.com/entry/2024/03/02/123027

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The maker's answer to chips falling out when peeing

The maker's proposals evolved from manual support to attached supports, reinforced cables, and an external guard.

Manual support was an early response to chip slipping during urination

In an entry published in January 2018, a customer asked how a linked pair could stay inside without an auxiliary chip. Mr. Okada's historical response relied on forceful support of the linked pair during urination. The same customer reported success about an hour later. His advice assumed continued manual support during urination.

(Source: ok-lab's diary, published January 2018)
https://ok-lab.hatenablog.com/entry/20180130/1517311002

Screw-shaped supports addressed chip slipping while leaving room for urine

An entry published in December 2019 addressed a beginner whose chip came out during urination. OK Lab focused on retaining it within the bulbar urethra (the wider passage near the penis base), before the narrower penile passage. The developer favored a screw-shaped auxiliary chip (an additional supporting piece) for this problem.

In an entry published in January 2020, Mr. Okada explained why: the twisted shape was intended to preserve space for urine around a supported chip. He described the main piece at the prostate and its auxiliary screw in the wider passage. He favored that support because he believed it could resist expulsion without shutting off urine flow.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/28/131319

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/25/150127

A U-turn stopper aimed to address chip slipping in both directions

In an entry published in January 2022, Mr. Okada described a U-turn stopper (a stopping piece that bends back on itself). His starting problem was a cable moving outward during urination and redirecting the urine stream. He applied the idea to cable and nylon-thread designs, claiming prevention of movement toward the bladder and almost no complete ejection. He said the freshly made prototypes needed further testing before release.

(Source: ok-lab's diary, published January 2022)
https://ok-lab.hatenablog.com/entry/2022/01/08/123729

A 4-line cable stopped chip slipping in one development test

In an entry published in March 2022, Mr. Okada reported a different approach: a 4-line support cable (paired cable lines reinforced with wires). In his downward-facing test arrangement, even his strongest urination produced no sign of the chip coming out. He credited the balanced support structure with resisting bending inside the narrow passage. He proposed the design as a way to keep a chip in place.

(Source: ok-lab's diary, published March 2022)
https://ok-lab.hatenablog.com/entry/2022/03/26/123336

A sliding-lock guard limited chip ejection without stopping internal movement

In an entry published in October 2023, Mr. Okada announced sales of a sliding-lock urethral guard (an accessory limiting outward escape). He explained that a nylon-thread chip could still shift during urination. For the described setup, the guard would stop it from flying into the toilet and breaking. He presented it as an option for compatible chips already fitted with the specified safety end-piece.

(Source: ok-lab's diary, published October 2023)
https://ok-lab.hatenablog.com/entry/2023/10/28/122832

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 chips falling out when peeing changed over time

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OK Prostate Chip products related to chips falling out when peeing

Current listings include models involved in reported problems and accessories the maker discussed for limiting ejection.

Products that appear in these entries

The sliding-lock guard is listed in OK Lab's own online store.

(Source: ok-lab's diary, published October 2019)
https://ok-lab.hatenablog.com/entry/2019/10/05/141806

(Source: ok-lab's diary, published October 2023)
https://ok-lab.hatenablog.com/entry/2023/10/28/122832

(Source: ok-lab's diary, published April 2026)
https://ok-lab.hatenablog.com/entry/2026/04/18/122906

Products the diary mentioned as alternatives

The screw-shaped support option is listed in OK Lab's own online store.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/28/131319

In an entry published in October 2021, Mr. Okada said standard sales of the old glass linked pair ended about 3 years earlier. He cited the risk of pieces overlapping and becoming impossible to remove.

(Source: ok-lab's diary, published October 2021)
https://ok-lab.hatenablog.com/entry/2021/10/16/125843

Historical custom builds, prototypes, and the movable models: No matching product can be confirmed on the current list.

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Common worries about chips falling out when peeing

The questions distinguish remaining inside the body from staying at the original position.

"Can a stopper prevent my chip falling out when peeing?"

In an entry published in July 2018, a customer said short and semi-long chips slipped out of the desired position. Mr. Okada distinguished inward movement toward the bladder from outward movement during urination. He said a sphincter stopper could prevent inward movement, while forceful urination could still expel the chip.

The diary does not record this customer's outcome after the reply. He suggested a chip with a cross-shaped neck as another possible improvement.

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

"Is chip slipping down to the auxiliary piece expected?"

In an entry published in January 2019, a customer asked whether movement down to the auxiliary piece was expected. The customer said that piece stopped the main chip from leaving the urethra. Mr. Okada treated that movement as expected and discussed internal repositioning, but the entry records no follow-up result. For the customer's separate concern about possible movement toward the bladder, he suggested a sphincter stopper.

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

"Would a longer model prevent my chip falling out?"

In an entry published in November 2019, a customer whose glass chip came out asked about models suited to longer retention. Mr. Okada said urination opens the sphincter, so he expected some downward movement with any chip under the conditions he described. He suggested longer or curved designs, while warning that remaining fixed throughout urination was not assured. He also advised against force when a displaced chip would not return easily.

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

"Would extra supports stop my chip falling out when peeing?"

In an entry published in May 2026, a customer asked whether multiple auxiliary pieces could reduce expulsion without making urination harder. Mr. Okada thought the added contact would increase friction and make outward movement less likely. The entry records no test result for that customer's proposed arrangement.

The customer also wanted the ceramic cross-neck design in resin or surgical stainless steel. Mr. Okada said those versions were unavailable then and future sales plans remained undecided. He cautioned that stopper-shaped pieces could restrict urine flow; he considered screw-shaped supports barely obstructive.

(Source: ok-lab's diary, published May 2026)
https://ok-lab.hatenablog.com/entry/2026/05/23/122904

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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.