My prostate chip won't move deeper | Easier movement does not establish safety [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 "difficulty moving the chip deeper" 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

The diary records difficulty moving chips deeper, including cases involving bleeding and hospital removal.

The maker discusses size, shape, and helper parts, but acknowledges that individual difficulty varies.

Current listings include ceramic chips and screw helpers; later diary entries describe further experiments.

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: difficulty moving the chip deeper

The OK Prostate Chip is a small device placed in the urethra (urine passage) to press on the prostate. Chip milking (movement through external pressure) is the diary's term for advancing it along that passage toward its intended position. That destination is the part of the urethra within the prostate. The accounts describe difficulty finding the chip, passing a bend, and managing extra parts attached behind it.

An early chip milking explanation now carries a withdrawn cotton-swab suggestion

An entry published in October 2017 describes a short chip about 30mm long, with enlarged ends intended to support movement. The entry now includes a later correction prompted by a reader's objection. Mr. Okada withdraws the cotton-swab suggestion, acknowledging that cotton swabs are unsuitable for the urethra.

(Source: ok-lab's diary, published October 2017)
https://ok-lab.hatenablog.com/entry/20171008/1507448709

A curved prototype prompted bleeding concerns during chip milking tests

In an entry published in January 2018, a tester reported bleeding with a curved prototype intended to anchor in the bladder. Mr. Okada attributed it to the curved tip's orientation and excessive strain on the sphincter (muscle controlling urine flow). He deferred a sales decision pending further tests and warned that this was the hardest design to handle.

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

A larger custom chip eased milking but brought other difficulties

In an entry published in January 2018, a customer reviewed a custom chip about 1cm longer than the usual short model. The customer found it easier to locate, but reported bleeding after roughly 12 hours and pain and bleeding after repeated use.

The same customer requested more length because the maximum 25cm retrieval thread (thread attached for removal) was insufficient. An editorial note says lengths beyond 25cm could be requested in order notes. Mr. Okada advises reading this as one person's experience, with substantial individual differences.

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

Custom screw chips added rotation to chip milking, with explicit warnings

In an entry published in July 2018, a customer proposed a twisted chip, and Mr. Okada agreed to investigate making it. He announced custom production, describing rotation during movement as its defining feature. The corrected prices, effective July 21, 2018, were ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) excluding tax for glass and ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) excluding tax for resin.

The diary does not record how the customer's proposed design felt in use. Mr. Okada explicitly declined to recommend the design because he expected greater strain on the urethra.

(Source: ok-lab's diary, published July 2018)
https://ok-lab.hatenablog.com/entry/20180707/1530947332

Flat-face curves introduced a different shape for chip milking

An entry published in December 2021 announced a chip curved across its broad face. Launch lengths were S: 38mm, M: 42mm, and L: 47mm, at ¥5,500 (about $35 at ¥156 = $1, rate as of 2026-09-04) excluding tax. Mr. Okada described easier handling and better stability as his own impressions. He directed readers to the explanation specific to this shape.

(Source: ok-lab's diary, published December 2021)
https://ok-lab.hatenablog.com/entry/2021/12/04/124140

Double-wire construction eased chip milking but proved intolerable for Mr. Okada

In an entry published in March 2025, a customer requested doubled wire for a stronger pulling effect. Staff initially proposed waiting for supplies, but Mr. Okada tested a 0.4mm double-wire version sooner. He found movement easier because the wire bent less.

He reports ending the test after about 2 hours, following what he describes as heart failure. Mr. Okada judged that version too strong for him and explored a thinner double-wire version.

(Source: ok-lab's diary, published March 2025)
https://ok-lab.hatenablog.com/entry/2025/03/08/123016

An integrated stopper brought another design change to chip milking

In an entry published in October 2025, Mr. Okada introduced a stopper joined directly to the chip. Shape-memory wire (wire that regains its shape after bending) allowed the stopper to flex. Mr. Okada described the stopper as another part that could transmit movement.

The external-sphincter version cost ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) excluding tax, including the specified reinforcement or attachment work. Mr. Okada stated that ceramic examples required his reinforcement treatment.

(Source: ok-lab's diary, published October 2025)
https://ok-lab.hatenablog.com/entry/2025/10/04/122910

Apple-shaped stoppers eased later chip milking but remained difficult to remove

In an entry published in December 2025, Mr. Okada introduced an apple-shaped stopper intended to limit movement in both directions. He reported easier chip milking beyond the penis tip, but considerable resistance during removal. Integrated and separate versions each cost ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) excluding tax.

He reported greater stability from the integrated construction. Mr. Okada cautioned that its fixed relationship to the main chip could also strain the urethra, depending on position.

(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 difficulty moving the chip deeper

Mr. Okada's responses changed both product designs and his assumptions about individual difficulty.

Removal failures led Mr. Okada to restrict long-chip recommendations despite milking claims

In an entry published in January 2018, Mr. Okada describes 2 occasions when his long test chip could not be removed. He says both episodes eventually ended with the chip coming out. He associated the difficulty with an older thread attachment that could separate under force. Mr. Okada warned beginners and intermediate users against purchasing that long version.

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

A hospital removal prompted longer leading chips in linked milking designs

In an entry published in March 2018, a customer reported that linked chips became tangled and required hospital removal. The report provided no further case details, so Mr. Okada's proposed explanation remained a hypothesis. He announced that future leading chips would be at least 30mm long, aiming to prevent reversal. Mr. Okada cautioned that even that length might reverse because body dimensions differ.

(Source: ok-lab's diary, published March 2018)
https://ok-lab.hatenablog.com/entry/20180310/1520672565

Smaller entry size and easier chip milking were separate considerations

In an entry published in June 2020, a Korean reader outside Japan asked about difficulty, risk, and a first purchase. OK Lab's staff distinguished easier initial entry with smaller chips from easier movement with somewhat larger ones. They also said that some users feel nothing and that sensations vary with position. Staff advised an inexpensive small chip initially, because a complex purchase might prove unusable or ineffective.

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

Persistent chip milking difficulty changed Mr. Okada's assumptions about experience

In an entry published in February 2022, Mr. Okada reconsidered whether practice would make chip milking possible for everyone. Requests from experienced customers led him to consider individual anatomy as another explanation. He began exploring alternatives to finger pressure. Mr. Okada nevertheless cautioned that additional tools could apply unintended force.

(Source: ok-lab's diary, published February 2022)
https://ok-lab.hatenablog.com/entry/2022/02/19/123621

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 difficulty moving the chip deeper changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to difficulty moving the chip deeper

These current listings appear in a customer's account that included both easier movement and adverse symptoms.

Products that appear in these entries

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

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

Products the diary mentioned as alternatives

The diary names no alternative.

Historical custom builds, prototypes, and launch versions discussed here: No matching product can be confirmed on the current list.

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Common worries about difficulty moving the chip deeper

"Does easier chip milking mean the device will feel good?"

In an entry published in September 2020, a customer lost track of the short ceramic chip and tried the twisted model. Its screw helper (a twisted additional chip intended to transmit movement) was easier to feel, but the customer reported severe urinary pain and slight bleeding.

The customer also reported no pleasurable sensation and asked whether this was normal. Mr. Okada emphasized individual differences and said position awareness could develop with experience. He identified excessive friction and possible tissue damage as concerns when pain occurred.

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

"Can a tube help when chip milking is difficult?"

In an entry published in June 2024, a customer asked whether a curved wire assembly's tail could help advance it. Staff said the existing 2.5mm tube lacked sufficient stiffness. After a further request, Mr. Okada developed a double-tube option with 4mm outer and 1mm inner diameters.

The historical addition cost ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) excluding tax up to 15cm, or ¥4,500 (about $29 at ¥156 = $1, rate as of 2026-09-04) excluding tax up to 25cm. The diary does not record that customer's subsequent experience with it. Mr. Okada cautioned that dryness could still prevent movement despite the added support.

(Source: ok-lab's diary, published June 2024)
https://ok-lab.hatenablog.com/entry/2024/06/01/123036

"Will a screw helper solve chip milking and bladder migration?"

In an entry published in December 2024, a beginner asked whether helpers would complicate movement or removal. Staff declined to decide on the customer's behalf and offered to pause production. Mr. Okada described the screw helper as potentially useful when moving the main chip was difficult.

He also said it offered little protection against bladder migration (movement into the bladder), because the helper could pass the sphincter too. The diary does not record whether the customer changed the order. Mr. Okada considered the screw optional when the main chip already reached its intended position reliably.

(Source: ok-lab's diary, published December 2024)
https://ok-lab.hatenablog.com/entry/2024/12/28/122907

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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.