Are linked prostate chips more comfortable? | The diary reports mixed results [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 "linked prostate chip comfort" 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

Linked chips sometimes felt steadier, but the diary also records bleeding and difficult removal.

Mr. Okada changed connections, spacing, and materials to address handling problems.

Resin pairs appear on the current list; the diary also records an earlier stop to standard glass-pair sales.

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: linked prostate chip comfort

The OK Prostate Chip is a small device placed in the urethra (the urine passage) to stimulate the prostate. Linked versions connect a leading chip to a second chip or further pieces using thread, wire, cord, or flexible joints. Mr. Okada designs these connections to change bending, comfort, and stability. The leading chip targets the prostate region; the second can occupy the wider passage below it.

An early linked chip test included a report of bleeding

In an entry published in January 2018, Mr. Okada described a linked prototype intended to anchor near the bladder. A tester reported slight bleeding during a test involving passage through a muscle opening. Mr. Okada considered the curved tip capable of placing excessive strain on that area and called this his most difficult linked design.

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

Linked chips prompted a warning about semen entering the bladder

In an entry published in January 2018, Mr. Okada discussed the internal urethral sphincter (the muscle at the bladder entrance). He warned that linked chips could hold it open, allowing semen into the bladder during ejaculation.

He described closely connected pairs as longer than 5cm, making bladder entry easier despite their relatively easy handling. He specifically cautioned against the leading chip being entirely inside the bladder.

(Source: ok-lab's diary, published January 2018)
https://ok-lab.hatenablog.com/entry/20180114/1515943724

Firmly settled linked chips still took 20 minutes to remove

In an entry published in March 2021, Mr. Okada abandoned a stretching spring design in favor of linked pieces around 10-20mm long. The proposed connection used a single cord alongside nylon thread, covered with rubber.

A later March 2021 entry clarified that the particular 3-piece test assembly actually used wire alongside nylon. Its pieces measured 5.6mm outside and slightly over 20mm long each. Mr. Okada reported no movement during urination over about 3 days, yet removal took around 20 minutes. He said further testing was needed to understand why different connections behaved differently.

(Source: ok-lab's diary, published March 2021)
https://ok-lab.hatenablog.com/entry/2021/03/13/130202

(Source: ok-lab's diary, published March 2021)
https://ok-lab.hatenablog.com/entry/2021/03/20/130148

Linked chips allowed comfortable urination in one customer report

In an entry published in May 2022, a customer reported smooth, painless urination with a customized pair of screw-shaped chips. The customer had requested several changes and expressed satisfaction with the completed device. Mr. Okada did not know its exact position inside the body. He suspected the larger rear screw provided support below the prostate and regarded its size as important to that customer's stable fit.

(Source: ok-lab's diary, published May 2022)
https://ok-lab.hatenablog.com/entry/2022/05/14/123043

Linked chips with electrodes prompted bleeding reports and spacing concerns

In an entry published in December 2024, a customer reported repeated bleeding with an electrode pair (two chips carrying electrical stimulation). An initially painless attempt also ended with pain and bleeding after about 1 hour. The customer suspected the rear chip's curve did not follow their urine passage.

They judged a second chip no longer than 32mm preferable for their own anatomy. They also proposed a gap of at least about 10mm, allowing for resin around the connection. The diary does not record Mr. Okada's reply or the result of a revised design.

(Source: ok-lab's diary, published December 2024)
https://ok-lab.hatenablog.com/entry/2024/12/07/122832

Three joined screws became a flexible alternative to linked chips

An entry published in June 2026 answered a customer's question about how much three connected screws could bend. The completed build used zero spacing and tube cushions (yielding tubing connections), measuring about 45mm overall. Mr. Okada reported that it bent flexibly and compared its length to a medium-length chip. He suggested that the joined screws could serve as the main chip without another leading piece.

(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 linked prostate chip comfort

Mr. Okada repeatedly redesigned the connections to balance flexibility, stable positioning, and the bulk between chips.

Linked resin chips gained an interlocking joint for greater stability

In an entry published in September 2018, Mr. Okada changed the connection on resin pairs. He adopted a cross joint (an interlocking connection) that bends in 2 directions, up-down and side-to-side. He expected improved urine flow and less outward movement, while also describing stronger local stimulation. He made it standard for plain resin and resin screw pairs, inviting interested customers to consider it.

(Source: ok-lab's diary, published September 2018)
https://ok-lab.hatenablog.com/entry/20180908/1536384939

Linked ceramic chips returned to testing with steel between them

An entry published in September 2019 revisited linked pairs whose sales Mr. Okada had suspended. His ceramic prototypes used stainless-steel thread only between the chips, creating what he described as a flexible, single-piece feel. He thought this might resolve most earlier problems and began tests aimed at bringing linked pairs back. For the portion outside the body, he favored nylon because exposed steel had proved awkward during longer use.

(Source: ok-lab's diary, published September 2019)
https://ok-lab.hatenablog.com/entry/2019/09/21/131939

Discomfort led Mr. Okada to favor gentler angles between linked chips

In an entry published in November 2020, Mr. Okada reported lingering discomfort after testing a short front chip with a 90-degree connection. An unusual prostate sensation persisted for about 1 day after removal. He suspected excessive stimulation from the connector's spring force. For short front chips, he suggested 45-60 degrees instead.

(Source: ok-lab's diary, published November 2020)
https://ok-lab.hatenablog.com/entry/2020/11/28/121505

Linked chips gained mixed materials to preserve spacing and external comfort

In an entry published in September 2025, Mr. Okada proposed nitinol (shape-memory wire) internally, joined to nylon outside the body. He reported more consistent chip spacing with nitinol, while nylon was easier to accommodate outside.

For lengths up to 20cm, the published surcharge was ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) for 2 strands or ¥2,500 (about $16 at ¥156 = $1, rate as of 2026-09-04) for 4, excluding tax. These published amounts covered the added connection. He recommended the mixed construction to keep each material where he found it most useful.

(Source: ok-lab's diary, published September 2025)
https://ok-lab.hatenablog.com/entry/2025/09/13/122925

Four flexible joints offered linked ceramic chips a smoother connection

An entry published in January 2026 introduced ceramic dual chips linked by 4 flexible joints. Mr. Okada described a smoother feel and less bulky connections than earlier constructions. The joints contained nitinol wire, with resin covering and rubber at the bending points.

Published pricing was the two chip prices plus ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04), excluding tax; the shortest stated delivery time was about 2 weeks. Mr. Okada allowed different ceramic chips in the pair and suggested smaller combinations for easier handling.

(Source: ok-lab's diary, published January 2026)
https://ok-lab.hatenablog.com/entry/2026/01/10/122922

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 linked prostate chip comfort changed over time

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OK Prostate Chip products related to linked prostate chip comfort

The current list includes resin pairs and a glass-pair price, but these entries do not confirm a restart of standard glass-pair sales.

Products that appear in these entries

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

(Source: ok-lab's diary, published September 2018)
https://ok-lab.hatenablog.com/entry/20180908/1536384939

Products the diary mentioned as alternatives

(Source: ok-lab's diary, published January 2018)
https://ok-lab.hatenablog.com/entry/20180121/1516504265

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

Historical prototypes and custom assemblies discussed above, including the steel chains, electrode pairs, mixed-thread connections, ceramic dual builds, and joined screws: No matching product can be confirmed on the current list.

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Common worries about linked prostate chip comfort

Questions centered on breakage, movement during urination, and difficulty retrieving long or overlapping chips.

"Can linked glass chips break against each other?"

In an entry published in January 2018, a customer asked whether contact between linked glass chips could cause breakage and injury. Mr. Okada could not guarantee that the glass would not break.

He proposed a resin pair restricted to 2mm spacing, with a planned price of ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) excluding tax. He approved its release after a personal prototype test without lotion. He offered the resin alternative particularly for people considering shorter use.

(Source: ok-lab's diary, published January 2018)
https://ok-lab.hatenablog.com/entry/20180121/1516504265

"Can linked chips come out during urination?"

In an entry published in January 2018, a customer asked how to keep linked chips from coming out during urination. The customer previously used a short chip with an auxiliary chip (an additional supporting piece). Mr. Okada replied about controlling movement, and the customer later reported urinating without the chips coming out. Elsewhere in that entry, Mr. Okada favored 0mm or 2mm gaps for easier handling.

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

"Why did standard sales of linked glass chips stop?"

In an entry published in October 2021, a customer who preferred glass pairs asked about reducing movement during urination. Mr. Okada said standard glass-pair sales had stopped about 3 years earlier because overlapping chips could become impossible to remove.

He could still consider custom ceramic pairs but could not predict whether they would feel as good. The diary does not record a completed order or a later comfort report. He favored chains of resin screw auxiliaries as a possible alternative.

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

"Could flexible linked chips address problems with rigid curved designs?"

In an entry published in May 2023, a customer asked about preventing another removal problem with a long, rigid curved chip. The diary records eventual removal the next morning, after earlier attempts had failed. Staff explained that its curved, rigid shape was designed to resist slipping out.

Mr. Okada warned that greater depth could complicate retrieval when a long chip could not bend. He pointed instead to auxiliary-chip extensions, partly flexible connections, or fully jointed designs. He advised against long, rigid chips reaching depths from which they could not be retrieved.

(Source: ok-lab's diary, published May 2023)
https://ok-lab.hatenablog.com/entry/2023/05/06/123024

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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.