Is it too late for a refund or replacement? | Older claims were refused, with one recorded exception [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 "refunds and replacements after use" 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

Older products were sometimes refused refunds or replacements because time had passed after delivery.

The maker offered early-fault support, paid motor replacement, and an exceptional refund or remake after bleeding.

The latest entry promised revised wire connections; current general refund terms are not recorded in the material.

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: refunds and replacements after use

The OK Prostate Chip is a device placed in the urethra, the urine passage, to act on the prostate. Here, refunds and replacements mean the maker's responses to faults reported after a product has reached its buyer. The entries discuss motors within vibrating chips, broken wires on loop models, and a stainless steel ring. Some replies refused support because time had passed; others offered refunds, including an exception following injury.

Motor replacement was offered when frequent stopping began within a week

In an entry published in May 2022, a customer reported a new vibrating chip stopping while changing its controller (mode selector) settings. The vibrating chip contains a small motor, whose intermittent faults Mr. Okada said could escape checks before shipment. According to him, flat motors of 8 mm or less were imported from China and Malaysia and varied in quality.

The diary does not record whether this customer's motor was replaced. Mr. Okada offered replacement for frequently stopping motors when the fault arose within 1 week of purchase.

(Source: ok-lab's diary, published May 2022)
https://ok-lab.hatenablog.com/entry/2022/05/21/124217

Refunds for broken wires excluded an older custom device

In an entry published in February 2025, a customer requested repairs for several broken custom devices. Version 4 of a custom bladder-loop chip had broken at its 90-degree retaining wire (a wire feature intended to hold it in position). The break occurred during removal; the customer also reported a broken connection on an earlier custom bladder-loop device.

Staff said the cause remained unknown, so repairs or remaking the devices would not solve it; they offered refunds for recent shipments. Their final response offered refunds for 2 items, excluding a much older device. Staff requested bank details for payment; the diary does not record whether those refunds were completed.

(Source: ok-lab's diary, published February 2025)
https://ok-lab.hatenablog.com/entry/2025/02/15/122943

A refund after use was refused for an old wire-loop model

In an entry published in April 2025, a customer reported an old wire-loop model breaking at its L-shaped bend. The customer described about 20 uses, lasting 1–5 hours each, and offered the broken item as a sample. Mr. Okada estimated about 6 breakage reports involving the old design and suspected damage introduced when he had formed the curves.

He refused a refund because considerable time had passed since delivery. No matching product can be confirmed on the current list. Mr. Okada suggested waiting half a year or a year, until breakage reports stopped, before deciding whether to buy.

(Source: ok-lab's diary, published April 2025)
https://ok-lab.hatenablog.com/entry/2025/04/26/122909

A refund for ring residue was offered without identifying its cause

In an entry published in May 2025, a customer reported black, oil-like residue during alcohol cleaning of a stainless steel ring. Further washing had made the problem worse, and the customer asked whether it was harmless. Staff said they did not know the cause or the detailed composition of the commercially sourced coil used in the ring.

They offered a refund after return if cleaning or boiling did not remove the residue, or if the customer remained worried about use. The customer instead intended to keep using it, based on their own online reading; the substance was not identified in the exchange. Mr. Okada requested information about possible problems and said evidence of a problem could lead him to stop selling it.

(Source: ok-lab's diary, published May 2025)
https://ok-lab.hatenablog.com/entry/2025/05/31/122940

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The maker's answer to refunds and replacements after use

The recorded responses depended on elapsed time, the reported fault, and whether the maker believed a repair could resolve it.

Motor replacement outside the initial-defect period carried the regular charge

Writing in May 2022, Mr. Okada said motor faults outside the initial-defect period would incur the regular replacement charge. An initial defect (an early fault) was the category he used for support shortly after purchase. He explained that a ¥100 (about $1 at ¥156 = $1, rate as of 2026-09-04) motor could leave several thousand yen of processing work wasted when it failed after assembly.

He said replacement work took about twice as much labor as making a new unit. The diary does not record the regular replacement fee; the manufacturing costs he discussed were not a quoted retail price. His stated response to motor failures after some use was to require the normal replacement payment.

(Source: ok-lab's diary, published May 2022)
https://ok-lab.hatenablog.com/entry/2022/05/21/124217

Wire replacement was refused months after the customer placed an order

In an entry published in May 2025, a customer requested a replacement for a wire-loop model ordered in January 2025. It had broken at a 90-degree bend during cleaning before use. Staff refused to treat it as an initial defect because time had passed since shipment, and the customer accepted that response.

Staff said the wire then being used was stronger and curved by its manufacturer before shipment. They nevertheless warned that it could break during extended use, depending on how it was used. Staff stated that replacement would remain unavailable long after shipment, including for products made with that stronger wire.

(Source: ok-lab's diary, published May 2025)
https://ok-lab.hatenablog.com/entry/2025/05/31/122940

A refund exception followed bleeding from an older wire-loop device

In an entry published in December 2025, a customer reported pain and bleeding from a sleeved wire-loop model made half a year earlier. A wire fragment protruded outward; the maker thought a loop connection (a joint holding a loop together) had slipped. He promised changes at all connections on every future shipment, with much larger white sections of resin (the material around those joints).

Although refunds were normally refused after that time, the maker offered a refund or remake because of the bleeding. The customer declined, explaining that the message was intended to help improve future production. No matching product can be confirmed on the current list.

(Source: ok-lab's diary, published December 2025)
https://ok-lab.hatenablog.com/entry/2025/12/27/122915

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 refunds and replacements after use changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to refunds and replacements after use

No current product is directly tied to this topic.

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Common worries about refunds and replacements after use

The replies distinguish early failures, requests for repair, and intermittent motor behavior; they do not establish one deadline for every product.

"Can a refund cover a wire broken before use?"

In an entry published in February 2025, a different customer asked what support was available after a wire snapped before use. The break occurred during a light pull while checking a wire-loop model. Staff applied their response for recently shipped items and arranged a refund through the online payment service PayPal.

The customer confirmed receiving the refund and welcomed the prospect of a revised design. No matching product can be confirmed on the current list. Staff advised following the diary for news of an improved version before considering another purchase.

(Source: ok-lab's diary, published February 2025)
https://ok-lab.hatenablog.com/entry/2025/02/15/122943

"Can a repair replace a refund for broken wire?"

In the February 2025 exchange about the custom bladder-loop chip, the customer preferred keeping that design to receiving money back. After the initial refusal, the customer offered to cover extra charges for repair or a new build. Staff reported that the maker no longer felt able to undertake the repair after the repeated failures.

No matching product can be confirmed on the current list. Mr. Okada hoped wire supplied with a preset curve would make a more durable build possible, but presented this as a possibility. He advised making another request after that wire became available.

(Source: ok-lab's diary, published February 2025)
https://ok-lab.hatenablog.com/entry/2025/02/15/122943

"Does motor replacement apply whenever vibration briefly stops?"

The customer in the May 2022 entry asked whether stopping during mode changes was part of the device's behavior. Mr. Okada described intermittent motors that could resume running and then continue for hours, alongside motors that stopped frequently. He treated occasional stopping as a characteristic some buyers might accept, while describing frequent stopping as making a motor unusable.

His explanation concerned variation between motors, including faults that inspection had not revealed. He asked buyers to accept occasional motor quirks, while offering early replacement when stopping was frequent.

(Source: ok-lab's diary, published May 2022)
https://ok-lab.hatenablog.com/entry/2022/05/21/124217

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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.