Can't feel your prostate chip? | The diary records variable responses [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 "not feeling anything with a prostate chip" 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 reported absent pleasure even when they could feel contact or strong vibration.

Mr. Okada discussed individual responses, mood, and position; he did not identify one solution for everyone.

The current list includes ceramic models involved in unsuccessful experiences, while later diary entries still describe fading sensation.

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: not feeling anything with a prostate chip

The OK Prostate Chip is a small device placed in the urethra to act on the prostate. This topic concerns customers who could feel little or no pleasure after the device was inside, sometimes despite noticing its presence earlier. In these entries, Mr. Okada distinguishes contact near the prostate from a pleasurable response, and discusses both physical circumstances and the person's state of mind.

No prostate chip sensation persisted with a larger custom model

In an entry published in January 2018, a customer hoped to regain lost sensations. A custom chip about 1cm longer than the usual short model still produced no prostate sensation, only surrounding fatigue during prolonged wear. They reported urethral injury, bleeding during urination after approximately 12 hours, and blood in semen after repeated use.

They also reported retrieval difficulties and thread-related pain. Mr. Okada discussed materials intended to reduce friction. He cautioned that no material eliminated friction entirely.

(Source: ok-lab's diary, published January 2018)
https://ok-lab.hatenablog.com/entry/20180118/1516263011

Not feeling anything left this customer's chip position uncertain

An entry published in April 2018 recorded 2 reports of sensation disappearing beyond the external urethral sphincter (the muscle before the prostate). One customer wanted confirmation that the place where their linked chips settled was correct. Mr. Okada initially thought the chip had reached the prostate, but then said there was no single correct resting position.

He proposed either the whole chip entering the bladder or weak awareness of prostate stimulation as possible explanations. The diary records neither confirmed positioning nor a later pleasurable response. His suggestions also included attention to psychological conditions.

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

Not feeling anything initially preceded a different response during masturbation

In an entry published in August 2018, a customer described pleasure on arrival followed by no further response. During masturbation, they subsequently reported an intense response throughout the body. The customer also reported bleeding with a custom glass screw-shaped pair, their first chip-related bleeding.

Mr. Okada acknowledged the report. He cautioned that a glass screw-shaped pair might be too demanding.

(Source: ok-lab's diary, published August 2018)
https://ok-lab.hatenablog.com/entry/20180825/1535182626

Not feeling pleasure persisted despite strong vibration from an early chip

In an entry published in April 2019, a customer reported that an early vibrating chip produced strong stimulation without sexual pleasure. Different strengths did not change that response, and they reported stinging and spontaneous pain afterward, describing an injury that resolved in 1 day. Mr. Okada replied that the design had already moved to its second version.

He said the injury report was unexpected given the feedback he had previously received. He wanted this account brought to readers' attention.

(Source: ok-lab's diary, published April 2019)
https://ok-lab.hatenablog.com/entry/2019/04/20/144337

No prostate chip sensation accompanied dissatisfaction with a glass model

In an entry published in May 2019, a customer wanted an alternative to an M-size glass chip they considered too thin. They reported little pleasure, followed by breakage during washing approximately 1 week after purchase. Mr. Okada apologized and said he would speed the transition to ceramic chips, with broader custom-design possibilities. He asked the customer to wait for that development.

(Source: ok-lab's diary, published May 2019)
https://ok-lab.hatenablog.com/entry/2019/05/04/162111

Not feeling anything accompanied pain with a short ceramic twist

In an entry published in September 2020, a customer asked why they felt no pleasure. They had lost track of a plain short ceramic chip, then tried a short ceramic twist with an auxiliary chip (an additional supporting chip). That attempt brought severe urinary pain and some bleeding, with pain reportedly gone after 2 days.

The customer remained uncertain about the chip's position. Mr. Okada said responses varied. He cautioned that pain could reflect damage to the urethral lining.

(Source: ok-lab's diary, published September 2020)
https://ok-lab.hatenablog.com/entry/2020/09/19/123115

Not feeling anything followed initially strong friction in an unglazed prototype

In an entry published in October 2020, Mr. Okada tested an unglazed chip measuring 40mm, with a maximum width around 8mm. He initially reported strong friction and noticeable sensation. He then thought moisture had coated the surface, reducing both friction and stimulation. He cautioned that longer wear had not been tested for its effects on the surrounding muscles.

(Source: ok-lab's diary, published October 2020)
https://ok-lab.hatenablog.com/entry/2020/10/10/121017

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The maker's answer to not feeling anything with a prostate chip

The maker discussed several approaches, alongside limits, unsuccessful experiences, and design concerns.

Not feeling anything prompted an early proposal for direct stimulation

In an entry published in October 2017, Mr. Okada recalled a proposal that direct urethral stimulation could help establish awareness of prostate pleasure. He believed that experiencing it could make later anal stimulation easier to appreciate. He described this idea as an influence on development. He also recalled general warnings against combining anal stimulation with long urethral devices because of danger.

(Source: ok-lab's diary, published October 2017)
https://ok-lab.hatenablog.com/entry/20171012/1507774414

Not feeling anything prompted caution about buying larger anal chips

In an entry published in November 2018, a customer asked whether a larger anal chip would solve their complete lack of sensation. Mr. Okada's reply discussed duration, position, depth, angle, bowel conditions, and differences between days. These comments concerned an anal device.

He also raised a different possible target: the seminal vesicles (structures discussed separately from the prostate). He said he was not selling the dedicated chip for that target because he considered its risks high. His advice was against increasing size while there was no sensation at all.

(Source: ok-lab's diary, published November 2018)
https://ok-lab.hatenablog.com/entry/20181117/1542436271

No prostate chip sensation remained possible despite more direct contact

In an entry published in December 2018, a customer asked whether successful placement should automatically feel pleasurable. Mr. Okada considered urethral stimulation more direct than anal stimulation, but said individual differences and learning to recognize sensations still mattered. He also described a tiny vibrating mechanism under development, intended to make position and stimulation more noticeable.

The diary does not record whether that customer's experience improved. He proposed vibration as a possible aid.

(Source: ok-lab's diary, published December 2018)
https://ok-lab.hatenablog.com/entry/20181222/1545459719

Not feeling anything was separate from resistance that prompted a warning

In an entry published in February 2020, a customer asked whether resistance justified forcing a chip farther. Mr. Okada suspected insufficient moisture was the most common reason for difficulty, while acknowledging other individual factors he could not assess. No subsequent outcome appears in the diary. He advised against force when the lining was dry, warning that it could cause bleeding.

(Source: ok-lab's diary, published February 2020)
https://ok-lab.hatenablog.com/entry/2020/02/29/155031

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 not feeling anything with a prostate chip changed over time

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OK Prostate Chip products related to not feeling anything with a prostate chip

Current listings include products from unsuccessful experiences and an alternative named by Mr. Okada.

Products that appear in these entries

(Source: ok-lab's diary, published May 2019)
https://ok-lab.hatenablog.com/entry/2019/05/04/162111

(Source: ok-lab's diary, published September 2020)
https://ok-lab.hatenablog.com/entry/2020/09/19/123115

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

Products the diary mentioned as alternatives

(Source: ok-lab's diary, published February 2020)
https://ok-lab.hatenablog.com/entry/2020/02/29/155031

Historical designs: January 2018 custom chip, August 2018 glass screw pair, early vibrating model, October 2020 prototype, and August 2021 titanium design.

No matching product can be confirmed on the current list.

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Common worries about not feeling anything with a prostate chip

The replies distinguish feeling contact, feeling pleasure, and knowing where a chip is.

"Can correct placement still mean not feeling anything?"

In an entry published in June 2020, a reader in South Korea asked whether correct placement meant immediate, continuous pleasure. Staff said some people felt nothing, while physical contact and mental state both seemed relevant. They also acknowledged a few cases of breakage inside the body.

The diary does not record whether this reader purchased a chip. Staff recommended ceramic or resin over glass, believing those materials would not form sharp pieces if broken.

(Source: ok-lab's diary, published June 2020)
https://ok-lab.hatenablog.com/entry/2020/06/27/120614

"Would a bigger chip solve not feeling anything?"

In an entry published in August 2021, a customer wanted a larger chip after smaller designs gave poor sensation and unstable positioning. The twist-shaped model provided some sensation, but the customer could not maintain its position. Mr. Okada admitted that he could not explain the reported inward movement confidently.

No result for his proposed alternative appears in the diary. He suggested a 44mm titanium twist with bumps, while warning that its enlarged rear might not pass the sphincter.

(Source: ok-lab's diary, published August 2021)
https://ok-lab.hatenablog.com/entry/2021/08/07/125807

"Will waiting solve not feeling anything with a prostate chip?"

In an entry published in January 2022, a single-chip resin customer described little awareness after the chip settled. They wanted a suitable, affordable alternative. Mr. Okada said a urethral chip alone did not generally justify expecting waves of pleasure simply from waiting. His response also suggested longer or auxiliary chips for stronger stimulation, without a recorded result for this customer.

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

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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.