Can I have sex with a prostate chip in? | The diary records pain and partner risks [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 "sex with a prostate chip in place" 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

• Sex with a chip brought reports of discomfort, bleeding, and concerns about a partner's safety.
• The maker required condoms in 2021 and acknowledged bleeding reports in 2023.
• Later prototypes changed the hardware, but their entries do not record completed tests during partnered sex.

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: sex with a prostate chip

The OK Prostate Chip is a small device placed in the urethra (the urine passage) to press on the prostate. The topic here is partnered sex or ejaculation while the device remains in place. Mr. Okada describes the purpose as adding prostate stimulation during sexual activity. Threaded designs include a retrieval thread (a thread attached for removal), which may extend beyond the urine passage.

Ejaculation with a chip did not dislodge one customer's larger resin design

In an entry published in April 2018, a customer reported finally being able to wear a larger custom resin chip. Their earlier attempt had failed, but the follow-up described a noticeably firmer fit than their usual chip. They said ejaculation did not push this custom design out of its position.

After ejaculation, they described strong gripping and substantial resistance before the device eventually came out. Despite that difficulty, the customer considered the experiment successful because the larger design felt different. Mr. Okada identified the message as a follow-up to the earlier unsuccessful attempt.

(Source: ok-lab's diary, published April 2018)
https://ok-lab.hatenablog.com/entry/20180414/1523697398

Sex with a prostate chip drew an explicit reservation from its maker

In an entry published in August 2018, Mr. Okada said most feedback concerned people using chips alone. He thought the device might have potential during partnered sex, but worried about problems arising between partners. He also made enthusiastic claims about increased sensation, presenting them as his own views. Despite that enthusiasm, Mr. Okada said he could not make a specific recommendation for partnered use because of possible trouble.

(Source: ok-lab's diary, published August 2018)
https://ok-lab.hatenablog.com/entry/20180818/1534566487

Sex with a vibrating prostate chip remained speculative in January 2019

In an entry published in January 2019, Mr. Okada discussed a vibrating chip combined with fabric supports and a cable. He suggested sex during vibration might be possible with condom coverage. The suggestion mentioned the fabric penis sleeve, but the passage gives no completed test during partnered sex. His suggestion remained conditional on a condom.

(Source: ok-lab's diary, published January 2019)
https://ok-lab.hatenablog.com/entry/20190105/1546673405

Pain after ejaculation accompanied Mr. Okada's separate vibration experiment

In an entry published in April 2023, Mr. Okada described a separate experiment involving a penis-flattening device and vibration. It also involved a urethral sound (an instrument for stimulation inside the urine passage). He reported occasional ejaculation, followed sometimes by abdominal pain lasting about half a day.

He suspected the experiment might be putting strain on his bladder. The diary does not record a medical assessment establishing the cause of that pain. Mr. Okada explicitly said he did not recommend the experiment.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/29/123107

Sex with a threadless prostate chip was proposed after personal testing

In an entry published in March 2025, Mr. Okada described testing a design without an external thread for about 20 hours. He credited the change to wire that returned to a preset shape. Earlier external threads, he wrote, sometimes pulled tight and required frequent cleaning.

He said the threadless design left the outside appearance unchanged and suggested a partner might not notice it during sex. Those statements concerned his expectations following personal wear testing. The diary does not record a completed partnered-sex test or a partner's response.

(Source: ok-lab's diary, published March 2025)
https://ok-lab.hatenablog.com/entry/2025/03/29/122912

Sex with a prostate chip was proposed for June 2026's revised design

In an entry published in June 2026, Mr. Okada described a micro-wire prototype with rear screw parts that eliminated a long external shaft. Only its thread remained outside the urine passage, which led him to suggest partnered sex might become possible.

The June 2026 price excluded tax: the existing device price, screw costs, ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) per screw for connection, and ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) for thread. The entry explicitly gave ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) as the connection charge for its two-screw example.

Mr. Okada reported testing the revised hardware himself. The diary does not record how it performed during partnered sex.

(Source: ok-lab's diary, published June 2026)
https://ok-lab.hatenablog.com/entry/2026/06/13/122909

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The maker's answer to sex with a prostate chip

The maker discussed exposed parts, required condoms in the 2021 manual, and later revised hardware after difficult-removal feedback.

Sex with a prostate chip raised concerns about exposed parts

In an entry published in October 2017, Mr. Okada said keeping all chip parts inside the urine passage was safer during sex. He also proposed self-removal if ejaculation failed to expel the device. These were statements about the connected design discussed in that entry.

He considered an external safety chip (a small connected part intended to help with retrieval) acceptable when a condom was present. His proposed sales arrangement allowed the lengths between connected parts to be specified in 1cm steps. Mr. Okada advised choosing those lengths with individual circumstances in mind.

(Source: ok-lab's diary, published October 2017)
https://ok-lab.hatenablog.com/entry/20171009/1507521149

Sex with a prostate chip prompted explicit condom requirements by 2021

An entry published in July 2021 reproduced a manual requiring condoms during sex with a chip in place. Its stated purposes were preventing injury to a partner's internal lining and preventing a chip remaining inside their body.

The same manual described semen becoming adhesive after ejaculation as one possible reason a chip could not be removed. This was the manual's explanation, without a recorded diagnosis for an individual case. The manual advised stopping use when discomfort differed from usual.

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

Ejaculation with a chip exposed difficulties that prompted greater flexibility

In an entry published in February 2026, a customer described a movable chip (a chip with flexible joints) that stayed comfortably positioned. They reported strong stimulation and substantial pressure during ejaculation, without bleeding. Removal was difficult, although they reported almost no pain during urination afterward.

Mr. Okada focused his reply on the reported difficulty getting the chip in and out. He developed a more flexible version and reported easier placement and removal in his own testing, alongside milder prostate pressure. His response favored offering greater flexibility for people experiencing those difficulties.

(Source: ok-lab's diary, published February 2026)
https://ok-lab.hatenablog.com/entry/2026/02/07/122919

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 sex with a prostate chip changed over time

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OK Prostate Chip products related to sex with a prostate chip

The current list includes the fabric sleeve named in the January 2019 suggestion about sex during vibration.

Products that appear in these entries

The fabric penis sleeve is listed in OK Lab's own online store.

(Source: ok-lab's diary, published January 2019)
https://ok-lab.hatenablog.com/entry/20190105/1546673405

Products the diary mentioned as alternatives

The diary names no alternative.

Custom resin chip, historical connected-chip configurations, penis-flattening setup, threadless design, movable variants, and rear-screw micro-wire prototype:

No matching product can be confirmed on the current list.

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Common worries about sex with a prostate chip

Reader questions concerned parts remaining inside a partner, pain, and bleeding during ejaculation.

"Could sex with a chip leave parts inside my partner?"

In an entry published in May 2018, a long glass-chip customer described trying partnered sex with the device still present. They stopped without ejaculating because they did not know what the chip would do afterward. They worried expelled thread and chips could remain inside their partner's vagina, and that the small safety chip could cause injury.

The customer thought a condom could catch an expelled chip and asked about a version without thread. Mr. Okada thanked them, but the supplied passage gives no substantive reply to that request. The diary does not record a later test that resolved their concern.

(Source: ok-lab's diary, published May 2018)
https://ok-lab.hatenablog.com/entry/20180524/1527153380

"Does pain after ejaculation mean something is wrong?"

In an entry published in January 2019, a screw-chip customer asked whether aching during crouching meant the chip was correctly positioned. Mr. Okada discussed possible sources of discomfort without confirming that interpretation. He separately attributed pain during ejaculation with a chip present to prostate contractions and said it would ease with time.

He added that recurring pain might indicate a problem with the prostate itself. The diary does not record a diagnosis or subsequent recovery for this customer.

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

"Can sex with a prostate chip lead to bleeding?"

In an entry published in February 2023, a customer seeking more pressure asked what to buy and whether partnered sex was possible. Mr. Okada discussed differing responses to stimulation, then said he thought a condom would prevent inconvenience to a partner. He immediately added that he had often received reports of bleeding after ejaculation with a chip in place.

He suggested prostate contractions made ejaculation a special situation, without diagnosing the cause of any particular report. The diary does not record this customer's later decision or outcome. Mr. Okada left the decision about sex to the individual.

(Source: ok-lab's diary, published February 2023)
https://ok-lab.hatenablog.com/entry/2023/02/18/122910

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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.