Is the rectal chip patented? | The maker reported approval in 2022 [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 rectal chip patents for prostate massagers 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

• Mr. Okada reported patent approval for the folded-strip rectal massager in an entry published in September 2022.
• He responded by revising its materials, support system, dimensions, and sales plans.
• The diary does not say what the current state is.

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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: rectal chip patents

The OK Prostate Chip is a device placed in the urethra to act on the prostate. The patent discussed here concerns a rectal chip, a separate massager placed in the rectum, inside the anus. Mr. Okada describes a strip folded back toward its base, intended to press toward the prostate from that side. The entries also distinguish this massager from a spiral device intended to help with bowel movements.

The first rectal chip patent plan halted an earlier model

In an entry published in September 2018, Mr. Okada announced a pause in sales of the early rectal twist model (Pro-Twist for Anus). The diary says no custom-order inquiries had arrived for that design. He planned to present a replacement after applying for a prostate massager patent.

Mr. Okada temporarily withheld detailed reports and images while the application was prepared. No matching product can be confirmed on the current list. He asked readers to wait until filing was finished before expecting further details.

(Source: ok-lab's diary, published September 2018)
https://ok-lab.hatenablog.com/entry/20180901/1535779541

A first rectal chip patent filing allowed only limited drawings

An entry published in September 2018 identified the first patent application (a filing seeking protection for an invention) as 2018-185691. Mr. Okada said it had been filed the previous day, while another related application was still being prepared.

He explained that the next design would have a substantially different shape despite sharing features with the first. His patent attorney allowed drawings within the filed application’s scope to be published. However, the attorney cautioned him against disclosing details of the next design prematurely.

(Source: ok-lab's diary, published September 2018)
https://ok-lab.hatenablog.com/entry/20180929/1538197876

The rectal chip patent filings separated massage from bowel assistance

In an entry published in October 2018, Mr. Okada reported completed application procedures for both a prostate massager and a bowel-movement aid. The bowel-movement aid’s application number was 2018-188692. He also listed a design-registration application for that aid; the diary does not explain this separate form of filing.

Mr. Okada identified the first design as the prostate massager. He classified the second and third designs as bowel-movement aids, intended to help remove stool from the rectum. Those were the purposes given to the filings, rather than a single prostate-massager description applied to every design.

(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181005/1538740535

The U-turn chip patent claim centered on a folded strip

In an entry published in September 2022, Mr. Okada reported patent allowance (approval of the application) in August 2022 for the 2018 filing. The patent claim (wording describing the structure for protection) specified a long, flat strip with outward and returning sections. Its tip turned back toward the base by 100° or more.

The application described a problem with cylindrical massagers: greater width hindered passage through the anus, while narrower shapes contacted the prostate less effectively. It presented the folded strip as a response to that problem. Mr. Okada reported approval without an initial refusal and said 16 years remained in the rights period at that time.

(Source: ok-lab's diary, published September 2022)
https://ok-lab.hatenablog.com/entry/2022/09/03/122644

The U-turn chip patent encouraged more confident sales and development

In a separate passage published in September 2022, Mr. Okada said he had previously sold rectal chips quietly out of respect for earlier developers. He now treated the patent decision as encouragement to sell the U-turn model more confidently. He also described making a two-bump aluminum prototype to mark the news.

Mr. Okada had withheld that manufacturing approach because he believed competitors could easily copy it without patent protection. No matching product can be confirmed on the current list. He planned to test the new aluminum version himself before starting sales.

(Source: ok-lab's diary, published September 2022)
https://ok-lab.hatenablog.com/entry/2022/09/03/122644

The spiral chip patent required another condition after refusal

In an entry published in October 2022, Mr. Okada reported approval for the spiral bowel-movement aid after an earlier refusal. An existing design had prevented a claim based on spiral shape alone, so the revised claim added the long, flat strip condition. He relayed his patent attorney’s view that equivalent shapes made by 3D printers also fell within the rights described.

The attorney reportedly said competitors could not make that shape for the next 16 years, as discussed in October 2022. No matching product can be confirmed on the current list. Mr. Okada’s new spiral prototype omitted suspension parts as standard, and he planned sales after his own testing.

(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/01/122944

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The maker's answer to rectal chip patents

Mr. Okada linked the patent work to changes in the rectal chip’s shape, surface, support, sizes, and sales plans.

The early rectal chip plan relied on belt support

In an entry published in September 2018, Mr. Okada proposed a belt-supported format for the future rectal massager. The planned arrangement combined it with the company’s traction belt, with support coming partly from the belt around the groin.

He presented this combined format as a way to avoid direct competition with established makers. Mr. Okada also acknowledged that his early design might fall behind existing products in performance. His stated plan was to introduce the new approach first and develop its shape gradually.

(Source: ok-lab's diary, published September 2018)
https://ok-lab.hatenablog.com/entry/20180901/1535779541

Scratches prompted a silicone covering for the U-turn chip

In an entry published in September 2022, Mr. Okada said the first aluminum prototype scratched easily and quickly proved unsuitable. He replaced its exposed surface with a silicone coating (a covering over the aluminum), which he said resolved scratches and dirt adhesion. He also argued that a flat contact surface would press toward the prostate more effectively than a rounded one.

The published aluminum strip measured 2mm thick and 10mm wide; after covering, it measured approximately 4mm thick and 12mm wide. The chip, suspension fittings, and elastic supports all had silicone outer surfaces. Mr. Okada presented these changes as a thorough revision of the hurried prototype made when the patent news arrived.

(Source: ok-lab's diary, published September 2022)
https://ok-lab.hatenablog.com/entry/2022/09/10/122847

Suspension gave the U-turn chip support and limited rotation

The redesign described in an entry published in September 2022 included suspension (external support) from the waist or shoulders. Mr. Okada said the wearable arrangement produced very little chip rotation. He presented that support as part of the design’s intended pressure and stability.

He also claimed bowel movements were possible with the chip remaining in the rectum, although firmer stool could expel it. In his account, the silicone tubing’s spring force then held the expelled device against the buttocks. For the support material, Mr. Okada favored a silicone-tube belt on cleanliness grounds.

(Source: ok-lab's diary, published September 2022)
https://ok-lab.hatenablog.com/entry/2022/09/10/122847

The U-turn chip price accompanied defined sizes and manufacturing limits

In an entry published in September 2022, the published internal lengths were 80mm for medium, 70mm for small, and 90mm for large. The chip’s bulge measured approximately 25mm. Mr. Okada described these modest dimensions as reflecting intended combination with a urethral chip and 24-hour retention.

The plain version without suspension cords cost ¥6,000, (about $38 at ¥156 = $1, rate as of 2026-09-04) tax excluded, as published in September 2022. Silicone-tube suspension cords added ¥1,000, (about $6 at ¥156 = $1, rate as of 2026-09-04) tax excluded, in that same entry. Mr. Okada said he was reluctant to accept larger custom sizes because making them required substantially more work and physical effort.

(Source: ok-lab's diary, published September 2022)
https://ok-lab.hatenablog.com/entry/2022/09/10/122847

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How rectal chip patents changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to rectal chip patents

No current product is directly tied to this topic.

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Common worries about rectal chip patents

(The material contains no questions from readers.)

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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.