Which prostate chips can be paired? | Options depend on the connection [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 "two-chip combinations" 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.

---

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

Two-chip combinations broadened chip choices but raised concerns about retrieval and unwanted inward movement.

Mr. Okada proposed different connectors, flatter supporting chips, and optional thread holes with stoppers.

The current list includes components named in the entries, with separate prices for each.

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.

---

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.

---

Before you read: key terms

---

What happens: two-chip combinations

The OK Prostate Chip is a small device placed in the urethra, the urine passage, to act on the prostate. Two-chip combinations join a chip in the prostate area to another in the bulbar urethra (the region occupied by the second chip). The springy connecting wire allows movement between them, which Mr. Okada says changes their action around the prostate. The diary later discusses versions connected with nylon thread.

Two-chip combinations opened both positions to more materials in April 2024

In an entry published in April 2024, Mr. Okada described a design that no longer required a specially drilled second chip. A shape-memory wire (a springy connector) joined the pair. He said every chip type could occupy either position, including pairs made entirely from blue chips or stainless steel.

Connector lengths were 3cm, 4cm, or 5cm, and pricing conditions remained the same as for the preceding arrangement. Mr. Okada favored this design over the earlier ceramic pair and invited questions about combinations.

(Source: ok-lab's diary, published April 2024)
https://ok-lab.hatenablog.com/entry/2024/04/27/122924

One ceramic two-chip combination eased removal but could slip out

In an entry published in May 2024, Mr. Okada described a custom ceramic chip (sea-slug version 4) paired with a short ceramic chip. He reported that the linked design resolved the custom chip's earlier removal difficulty while preserving its ability to stay in place.

This was his account of the combination, with no customer follow-up recorded in that passage. Mr. Okada cautioned that the pair could come out easily when it sat shallowly.

(Source: ok-lab's diary, published May 2024)
https://ok-lab.hatenablog.com/entry/2024/05/04/122911

A resin two-chip combination carried separate component prices in June 2024

In an entry published in June 2024, a customer requested a long resin chip (Zoro) paired with a curved flat resin chip. The request specified the curved chip in size L (47mm), a covered 3cm connector, and 35cm thread.

The long chip was listed at ¥8,250 (about $53 at ¥156 = $1, rate as of 2026-09-04), and the curved flat chip at ¥6,050 (about $39 at ¥156 = $1, rate as of 2026-09-04), as published in June 2024. These were component prices in that request. The diary does not record a separate reply or how this pair felt in use.

(Source: ok-lab's diary, published June 2024)
https://ok-lab.hatenablog.com/entry/2024/06/08/123008

Second-generation two-chip combinations received an itemized quotation in November 2025

In an entry published in November 2025, a customer wanted two blue resin chips joined. The quoted second-generation resin parts were ¥9,350 (about $60 at ¥156 = $1, rate as of 2026-09-04) for the long chip and ¥6,600 (about $42 at ¥156 = $1, rate as of 2026-09-04) for the curved flat chip in size L.

A covered 3cm connection was ¥4,400 (about $28 at ¥156 = $1, rate as of 2026-09-04), and a thread hole on the curved flat side was ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04). These were prices published in November 2025. The diary does not record whether the customer accepted the quotation. The maker proposed the balancing arrangement for the requested pair.

(Source: ok-lab's diary, published November 2025)
https://ok-lab.hatenablog.com/entry/2025/11/29/122908

Nylon two-chip combinations were possible with ceramic chips by August 2026

In an entry published in August 2026, Mr. Okada reported dwindling blue chip stocks while discussing a nylon-connected prototype. He said this form of two-chip combination could also be made with ceramic chips.

He expected supplies of the small blue safety component to last for the time being because each production batch yielded substantial stock. Mr. Okada also invited interest in the nylon-connected design.

(Source: ok-lab's diary, published August 2026)
https://ok-lab.hatenablog.com/entry/2026/08/22/122905

---

The maker's answer to two-chip combinations

Mr. Okada's proposals address the connection, the supporting chip's shape, and concerns about retrieval.

Wire two-chip combinations changed the forces involved but retained retrieval concerns

In the April 2024 entry, Mr. Okada blamed earlier tangling problems on the flexible connection folding and allowing the chips to overlap. He believed a wire that resisted folding would prevent that problem from obstructing removal. His explanation involved a pulling force on the first chip and a pushing force on the second through the wire.

However, he thought complete movement into the bladder would make a pair with a central thread attachment difficult to retrieve. He proposed an end hole for retrieval thread (thread intended for removal), believing this could permit retrieval even after the whole assembly entered the bladder.

(Source: ok-lab's diary, published April 2024)
https://ok-lab.hatenablog.com/entry/2024/04/27/122924

Bare wire kept the joint thinner in two-chip combinations

Both bare and tube-covered connections were offered in an entry published in May 2024. The tube added at least 1mm of thickness at the joint compared with bare wire.

Beyond the two chips, the published connection charge was ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) tax excluded for bare wire or ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) tax excluded for covered wire. Mr. Okada recommended bare wire when a thinner joint was the priority.

(Source: ok-lab's diary, published May 2024)
https://ok-lab.hatenablog.com/entry/2024/05/04/122911

Flatter supporting chips were favored for steadier two-chip combinations

In the May 2024 entry, Mr. Okada described a pair with curved flat chips on both sides. He thought this arrangement was less likely to lean sideways and was suited to longer stays in place.

He also described a version with the bulb-side curve facing the opposite way, which he said produced stronger pressure. Mr. Okada regarded that version as unsuitable for longer stays.

(Source: ok-lab's diary, published May 2024)
https://ok-lab.hatenablog.com/entry/2024/05/04/122911

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.

---

How two-chip combinations changed over time

---

OK Prostate Chip products related to two-chip combinations

The current list gives component prices for several chips and accessories discussed in these entries.

Products that appear in these entries

The six-hole sphincter stopper is listed in OK Lab's own online store.

The second-generation long resin chip is listed in the company's own online store.

The second-generation curved flat resin chip is listed in the company's own online store.

(Source: ok-lab's diary, published June 2024)
https://ok-lab.hatenablog.com/entry/2024/06/08/123008

(Source: ok-lab's diary, published November 2024)
https://ok-lab.hatenablog.com/entry/2024/11/16/122924

(Source: ok-lab's diary, published November 2025)
https://ok-lab.hatenablog.com/entry/2025/11/29/122908

Products the diary mentioned as alternatives

The short ceramic chip is listed in the company's own online store.

(Source: ok-lab's diary, published May 2024)
https://ok-lab.hatenablog.com/entry/2024/05/04/122911

Custom sea-slug version 4 builds and complete wire- or nylon-connected assemblies: No matching product can be confirmed on the current list.

---

Common worries about two-chip combinations

The reader's questions concern the thread hole, the stopper, and the position of the thread attachment.

"Will a thread hole change how two-chip combinations move?"

In an entry published in November 2024, a customer requested a slim double-twist ceramic chip paired with a custom ceramic version 4 chip. They asked whether a thread hole would spoil the balancing action. Staff replied that the pair could retain its usual arrangement when the optional hole was unused.

The customer also asked about a sphincter stopper (an accessory intended to limit inward movement). Mr. Okada warned that the hole created a noticeable bulge, which might cause urethral irritation. His proposed safeguard was a stopper at that hole, which he believed could prevent both chips from reaching the bladder.

(Source: ok-lab's diary, published November 2024)
https://ok-lab.hatenablog.com/entry/2024/11/16/122924

"Can the stopper on two-chip combinations be detached?"

In the November 2024 exchange, the customer asked whether the stopper was designed to be detachable. Staff confirmed that customer removal was part of the design.

The customer then kept the order unchanged; the diary does not record how the completed arrangement felt in use. Staff's proposed delivery configuration included the thread through the hole and the stopper already fitted.

(Source: ok-lab's diary, published November 2024)
https://ok-lab.hatenablog.com/entry/2024/11/16/122924

"Does the thread position matter for two-chip combinations?"

In the November 2024 exchange, the same customer requested a thread attachment slightly off-center toward the custom ceramic chip. Staff replied that its position on the wire was movable, so there was no fixed initial position.

The reply also addressed the requested modified version of the custom ceramic chip. Staff said the connection flattened the rear of version 4, making it effectively equivalent to version 4 modification 1. Staff therefore said no change to the version designation was needed.

(Source: ok-lab's diary, published November 2024)
https://ok-lab.hatenablog.com/entry/2024/11/16/122924

---

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.

---

Summary of this article

---

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.