Can a plate and belt keep the chip in place? | The maker reports support and fit problems [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 "external fixation with a plate and belt" 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

• External plates and belts supported the maker’s prototypes, but movement, skin pain and difficult release remained concerns.
• Mr. Okada changed the plate, supports and belt materials as different problems emerged.
• The current list includes separate plates, supports and belts; historical versions had different specifications.

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: keeping the chip in place

The OK Prostate Chip is a small device placed in the urethra to act on the prostate. A holding plate (an external support) and fixation belt (its securing straps) were developed to press against the penis and support its position. Some designs added a urethral sound (a rod in the urine passage) and support behind the scrotum (the testicles’ skin sac). The entries describe changing prototypes, including arrangements intended to support a chip without concealing the whole penis.

A fixation belt offered support, but the flexible sound still shifted

In an entry published in December 2022, Mr. Okada describes a flexible 4-wire sound prototype that became unstable under pressure. He reports that slack needed attention after every urination.

In the same trial, he found that a fixation belt could support the sound without the plate. He reports being able to go about daily activities without holding it by hand. He cautions that this arrangement would not withstand vigorous exercise.

(Source: ok-lab's diary, published December 2022)
https://ok-lab.hatenablog.com/entry/2022/12/10/123048

Holding plate crossbar pain emerged after half a day

In an entry published in January 2023, Mr. Okada reports skin pain where the plate’s 6 cm lower crossbar contacted the scrotum. The discomfort appeared after about half a day, prompting a planned reduction to about 4 cm.

He also abandoned thin wire in the plate because he considered it hazardous against scrotal skin in the revised arrangement. Clothing straps were another proposed change, but he found them slippery against skin. He favored tubing where firm fixation was the aim.

(Source: ok-lab's diary, published January 2023)
https://ok-lab.hatenablog.com/entry/2023/01/14/122952

A wider holding plate hole ended the condom-and-tube drainage project

An entry published in April 2023 describes the central opening changing from approximately 7 mm to approximately 20 mm. The wide-hole plate (a plate with an enlarged opening) exposed the area around the urinary opening on its outer side. Mr. Okada reports improved fixation without depending on a sound to locate the head of the penis.

He stopped the condom-and-tube drainage project because it would cover the newly exposed tissue. He also warned that replacing the plate would not resolve an existing inability to achieve compression.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/22/123057

A smaller holding plate hole left the maker struggling with release

In an entry published in May 2023, Mr. Okada compares openings of approximately 2.5 cm and 2 cm. He reports that the larger opening allowed release, whereas the smaller opening left the plate difficult to remove. He describes the smaller plate remaining attached during daily activities.

He raised the possibility that an erection could make release impossible. His warning was against full passage of the head through the hole for people prone to strong erections.

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

A retained holding plate remained restrictive after the belt came off

An entry published in May 2023 describes further difficulty releasing the plate around the head of the penis. Mr. Okada reports that attempts to force release were unsuccessful.

He also reports being unable to ejaculate while the plate remained attached, even after the belt was removed. He explicitly says the reason was unknown.

(Source: ok-lab's diary, published May 2023)
https://ok-lab.hatenablog.com/entry/2023/05/13/123004

Faux leather parts weakened the holding plate’s production prospects

In an entry published in January 2024, Mr. Okada explains why development updates had paused. Repeated daily washing caused the faux leather’s polyester surface to separate from its backing fabric.

He had not decided whether to continue the product plan, although ceramic plate production continued. He questioned the suitability of faux leather for an item requiring such frequent washing.

(Source: ok-lab's diary, published January 2024)
https://ok-lab.hatenablog.com/entry/2024/01/06/123004

Added fixation belt restraints carried a separate historical price

An entry published in January 2024 announces a revised belt for ceramic underwear (the later downward-holding plate assembly). The belt gained a ring section intended to hold the testicles in an elevated position.

A separate silicone-tube accessory for tightening around their base was also introduced. The published belt price was ¥2,500, (about $16 at ¥156 = $1, rate as of 2026-09-04) tax excluded.

(Source: ok-lab's diary, published January 2024)
https://ok-lab.hatenablog.com/entry/2024/01/27/123012

New fixation belt prices accompanied a pause in constricting designs

In an entry published in February 2024, the revised belt cost ¥2,000, (about $13 at ¥156 = $1, rate as of 2026-09-04) tax excluded. The ceramic plate alone had cost ¥7,000, (about $45 at ¥156 = $1, rate as of 2026-09-04) tax excluded; the version with a resin support and glass ornament cost ¥11,000, (about $70 at ¥156 = $1, rate as of 2026-09-04) tax excluded.

Mr. Okada suspended sales of the preceding constricting belt and testicular ribbon for the time being. He still mentioned the earlier arrangement for customers specifically wanting that restraint. His stated preference was the newer design without testicular tightening, which he considered gentler on the body.

(Source: ok-lab's diary, published February 2024)
https://ok-lab.hatenablog.com/entry/2024/02/03/123017

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The maker's answer to keeping the chip in place

Mr. Okada’s proposed measures addressed belt discomfort, plate movement and support for the chip as separate problems.

Softer fixation belt material reduced discomfort at tubing joints

In an entry published in January 2023, Mr. Okada reports discomfort where sections of tubing joined. He tested stocking fabric in dry areas and tubing where the belt became wet.

He says the softer fabric made the steps at the joints less noticeable. His favorable account concerned the prototype with wire enclosed in tubing. He cautioned that an exposed-wire version still pressed strongly against the urethra during posture changes.

(Source: ok-lab's diary, published January 2023)
https://ok-lab.hatenablog.com/entry/2023/01/28/122843

A perineal bar improved holding plate stability in the maker’s account

An entry published in March 2023 describes pressure from both the front plate and a perineal bar (support behind the scrotum). Mr. Okada credits this arrangement with a major improvement in stability at the penis’s base.

The assembly comprised a belt, front plate, perineal bar and sound. He says compression was possible without the sound, but misplaced perineal pressure left the arrangement unstable. His recommendation was to retain the perineal bar as part of the set.

(Source: ok-lab's diary, published March 2023)
https://ok-lab.hatenablog.com/entry/2023/03/18/122146

A rigid sound still moved when its holding plate rocked

In an entry published in April 2023, Mr. Okada distinguishes a sound keeping its shape from one keeping its position. Without perineal support, he reports that the base plate could rock during posture changes.

He experienced pain during prolonged placement when the rigid sound swung sideways. He favored contact between the perineal support and the body to reduce that rocking.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/08/122508

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 keeping the chip in place changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to keeping the chip in place

The current list includes named support components, but it does not establish that historical configurations remain available.

Products that appear in these entries

(Source: ok-lab's diary, published March 2023)
https://ok-lab.hatenablog.com/entry/2023/03/18/122146

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/08/122508

Products the diary mentioned as alternatives

The diary names no alternative.

Historical builds include the sound prototypes, custom vibrating assembly, simplified ceramic plate, and later ceramic underwear and its belts. No matching product can be confirmed on the current list.

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Common worries about keeping the chip in place

Readers asked about fit, the position of the penis, slipping and differences between plate designs.

"Can external support make a custom curved sound fit everyone?"

In an entry published in April 2023, a customer asked to buy a curved prototype intended to draw the prostate closer. Staff said producing a customer-specific fit was basically impractical, so they could not sell it with that claimed effect.

The customer then asked about sound length with a ceramic stimulation chip. Mr. Okada supplied his own measurements and custom-length pricing. The diary does not record an order or trial. He cautioned that his dimensions would not suit everyone.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/08/122508

"Where does a holding plate put the penis?"

In an entry published in May 2023, a reader could not picture where the penis and testicles sat. They asked whether the device folded the penis or pressed it toward its base. Mr. Okada described a downward path near the skin before it curved inward, rather than immediate straight-back displacement.

He explained that the lower plate supported the section near the surface, while the bar and tubing helped guide its position. The diary does not record the reader’s later experience. His preference in that reply was for the wide-hole plate.

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

"Could external support stop a jointed chip slipping out?"

In an entry published in May 2023, a customer reported a vibrating chip slipping out during use. Their order included a 12 cm jointed cable (a flexible connector), a tip motor and a waterproof USB connection. Mr. Okada explained that the jointed cable had no structure intended to prevent outward movement.

Email delivery had failed, so he published the reply in the diary. The diary does not record whether the customer tried his proposal. He suggested external support, including a large-hole plate, as a possible answer.

(Source: ok-lab's diary, published May 2023)
https://ok-lab.hatenablog.com/entry/2023/05/27/122912

"Can ceramic underwear prevent erections with a fixation belt?"

In an entry published in February 2024, a reader asked whether older plates or ceramic underwear prevented erections. Mr. Okada said older plates had not fundamentally suppressed erections; he attributed greater restraint to the ceramic underwear’s right-angled resin support. He described about 3 cm of available external length, while noting that the exposed head could still swell.

A confirmed follow-up published in March 2024 asked whether the resin support was necessary. The diary records no purchase or subsequent experience. He replied that the support could be omitted if erection restraint was not a priority.

(Source: ok-lab's diary, published February 2024)
https://ok-lab.hatenablog.com/entry/2024/02/24/122947

(Source: ok-lab's diary, published March 2024)
https://ok-lab.hatenablog.com/entry/2024/03/02/123027

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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.