Will a stuck chip come out when I pee? | Some cases needed hospital removal [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 "waiting for a chip to come out during 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

Some chips passed during urination; others remained inside and required hospital removal.

The maker described spontaneous passage, but also warned about breakage, tangled threads, and failed stoppers.

The April 2026 case remained unresolved after about 1 week.

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: waiting for a chip to come out

The OK Prostate Chip is a small device placed in the urethra to act on the prostate. These entries describe whole chips or broken pieces remaining in that passage or moving into the bladder. Waiting for spontaneous passage means expecting urination to carry the object out, as the maker repeatedly proposed. Outcomes include passage, continued pain, and hospital removal; some cases remained unresolved at publication.

Early claims about chip passing in urine still acknowledged injury risks

In an entry published in October 2017, Mr. Okada claimed that glass fragments remaining in the urethra would pass during urination. He nevertheless acknowledged possible minor injury. Its coating and embedded thread were protective measures, without a claim of absolute safety. Mr. Okada cautioned that unexpected damage remained possible.

(Source: ok-lab's diary, published October 2017)
https://ok-lab.hatenablog.com/entry/20171006/1507295400

Long chip removal already raised concerns about shape and experience

In an entry published in January 2018, Mr. Okada described about 2 occasions when his long chip would not come out. He reported eventual passage during urination but said the long design struggled to pass the urethral curve.

He had previously announced cancellation, then decided to release the long model despite the risks. He described it as intended only for short sessions because prolonged placement could injure a sphincter (a muscle that closes a passage). Mr. Okada advised beginners and intermediate users against buying it.

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

A modified chip stuck inside passed after prolonged bladder discomfort

An April 2018 entry describes a customer's modified long chip connected to another chip. The connection failed, leaving the long chip in the bladder without an accessible retrieval thread (the cord intended for removal).

The customer reported dull pain during urination and eventual passage after 1 week. Mr. Okada advised against purchasing long chips without accepting that hospital care might become necessary.

(Source: ok-lab's diary, published April 2018)
https://ok-lab.hatenablog.com/entry/20180407/1523090115

A large chip passing in urine followed painless bladder movement

A May 2018 entry jointly written by Mr. Okada and a customer describes a large chip entering the bladder without noticeable pain. Their account said it became caught there and later emerged tip first during urination. They attributed later pain during urination to bladder contraction.

The accompanying warning relied on urine-assisted removal and cautioned against use lasting beyond 1 night. Mr. Okada also warned about inward movement swallowing the thread's end.

(Source: ok-lab's diary, published May 2018)
https://ok-lab.hatenablog.com/entry/20180505/1525509161

Apparent chip passage did not exclude extensive bladder lining injury

Entries published in January and February 2019 describe a customer whose semi-long twisted glass chip lost its tip inside the body. The main body emerged during urination, but the customer never recovered the missing fragment.

After about 1 week of continuing discomfort, the customer sought medical care. The customer believed it passed unnoticed before a cystoscope (a bladder viewing instrument) found no fragment but extensive bladder lining injury. The customer requested a plain glass replacement; Mr. Okada apologized. He warned that glass breakage could cause injury despite his earlier experiences.

(Source: ok-lab's diary, published January 2019)
https://ok-lab.hatenablog.com/entry/2019/01/26/152042

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/02/153358

A curved chip stuck inside required removal at hospital

A separate customer in the January 2019 entry reported bladder migration of a strongly curved chip with a section over 10mm wide. The customer saw no sign of spontaneous passage and underwent hospital removal using an internal viewing instrument.

Mr. Okada reported successful gripping of the thread with forceps (a medical gripping instrument). He emphasized the importance of the retrieval thread remaining outside the body.

(Source: ok-lab's diary, published January 2019)
https://ok-lab.hatenablog.com/entry/2019/01/26/152042

A chip stuck after cable failure defeated initial hospital retrieval

A November 2020 entry describes a customer's custom chip becoming inaccessible after cable breakage. Reinforcement had repeatedly peeled away, but use continued.

The chip reached the bladder, where an initial forceps attempt failed; another attempt under general anesthesia (not explained in the diary) was planned. The next day's update reported removal outside hospital, without establishing spontaneous passage. Mr. Okada warned against using cables whose covering had peeled away and exposed wires.

(Source: ok-lab's diary, published November 2020)
https://ok-lab.hatenablog.com/entry/2020/11/14/131426

A broken chip stuck inside required referral for suitable equipment

In an entry published in March 2024, Mr. Okada reported a second-version sea-slug chip that had broken in half. Its tip remained in the bladder after 1 week of waiting. The consulted clinic had a viewing instrument but no forceps, so it referred the customer to a university hospital. The diary does not record the removal outcome in this entry.

(Source: ok-lab's diary, published March 2024)
https://ok-lab.hatenablog.com/entry/2024/03/16/123023

The latest chip stuck inside report still lacked confirmed removal

Entries published in March and April 2026 describe a blue chip retained after thread failure. The April follow-up reported about 1 week without spontaneous passage and continuing pain during urination.

Mr. Okada answered the customer's tool questions with an untested retrieval concept. These entries do not record successful removal. Staff cautioned that the proposed tool might slip or move the chip farther inward.

(Source: ok-lab's diary, published March 2026)
https://ok-lab.hatenablog.com/entry/2026/03/28/122908

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

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The maker's answer to waiting for a chip to come out

The maker's responses included prevention, warnings about damaged components, and medical referral when passage failed.

A swallowed thread prompted chip removal precautions outside the body

A March 2019 entry records a customer's question about preventing another disappearance of a cross-jointed resin chip's thread. The chip had emerged during urination after the thread and its end piece disappeared inside. Staff suggested external stoppers intended to keep the thread accessible. They also suggested a sphincter stopper (a component intended to limit bladder migration) to prevent deeper movement.

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

Suspected tangled thread changed the maker's response to chip removal

A May 2020 entry describes a stuck short ceramic chip with a screw-shaped auxiliary chip (an added connected component). Staff suspected thread entanglement and favored spontaneous passage over thread tension in that situation.

When passage still failed the following morning, Mr. Okada advised an early medical consultation. A later message reported passage, but the lost device could not be examined. Staff favored a single chip with a sphincter stopper for this customer, while acknowledging prevention was uncertain.

(Source: ok-lab's diary, published May 2020)
https://ok-lab.hatenablog.com/entry/2020/05/02/131505

The historical manual placed waiting before medical help for chip removal

A manual published in July 2021 described waiting for spontaneous passage after thread failure. It placed medical consultation after more than 1 week without passage.

This was historical manufacturer guidance. The manual also advised against customers repairing or modifying products themselves.

(Source: ok-lab's diary, published July 2021)
https://ok-lab.hatenablog.com/entry/2021/07/24/125923

Cracked auxiliary parts prompted another warning despite eventual chip passage

In an entry published in June 2025, a customer reported a tail-mounted screw auxiliary part remaining inside after the main chip came out. There was blood in the urine, and the missing part emerged after 2–3 hours.

Mr. Okada suspected separation where resin layers had been bonded and considered similar construction potentially vulnerable. He urged inspection before use.

(Source: ok-lab's diary, published June 2025)
https://ok-lab.hatenablog.com/entry/2025/06/07/122954

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 waiting for a chip to come out changed over time

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OK Prostate Chip products related to waiting for a chip to come out

Current listings include products involved in incidents and stoppers suggested for prevention.

Products that appear in these entries

(Source: ok-lab's diary, published May 2020)
https://ok-lab.hatenablog.com/entry/2020/05/02/131505

(Source: ok-lab's diary, published March 2020)
https://ok-lab.hatenablog.com/entry/2020/03/14/141804

Products the diary mentioned as alternatives

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

Historical versions, nicknames, and custom builds: No matching product can be confirmed on the current list.

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Common worries about waiting for a chip to come out

Readers asked about different shapes, waiting times, and threads that disappeared inside.

"Does short chip passage mean a long version will pass?"

In an entry published in February 2018, a customer reported a short chip passing after about 2 hours, then asked about a threadless long chip. Mr. Okada said the short, straight design could pass with little urine, while the curved long design could be held by 2 sphincters.

He emphasized that passage might not happen when the customer urgently wanted removal. A later message from the same customer described the short chip failing to emerge until the following morning. Mr. Okada attributed that difficulty to psychological pressure. He advised against threadless use of the then-current long design.

(Source: ok-lab's diary, published February 2018)
https://ok-lab.hatenablog.com/entry/20180214/1518601774

"Could my chip stuck inside pass within a week?"

In December 2021, the diary published this question after a customer lost a custom chip that had previously passed easily. Staff considered passage possible but identified medical care as safer if self-resolution seemed uncertain.

Repeated urination did not resolve the problem, and the customer later reported pus. Hospital removal using a cystoscope took about 10 minutes, with a reported procedure charge exceeding ¥30,000 (about $192 at ¥156 = $1, rate as of 2026-09-04). The customer regretted delaying medical care. Mr. Okada cautioned that a stopper could still fail to prevent bladder migration.

(Source: ok-lab's diary, published December 2021)
https://ok-lab.hatenablog.com/entry/2021/12/25/123556

"Can urination recover the thread from a chip stuck inside?"

A February 2025 entry describes a fifth-version sea-slug chip and large mesh stopper entering the bladder, swallowing all 35cm of thread. After about 4 urinations without the thread appearing, the customer asked about avoiding scheduled removal.

Staff knew no reliable way to make the thread emerge and favored the doctor's proposed treatment. Hospital removal succeeded, with reported charges of ¥25,000 (about $160 at ¥156 = $1, rate as of 2026-09-04) for surgery and about ¥35,000 (about $224 at ¥156 = $1, rate as of 2026-09-04) including other care. The customer subsequently reported infection following removal injuries. Mr. Okada warned that sphincter stoppers could not guarantee prevention of bladder migration with linked chips.

(Source: ok-lab's diary, published February 2025)
https://ok-lab.hatenablog.com/entry/2025/02/22/122939

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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.