Can I return a used chip? | Past replies refused used-product returns [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 "returning a used chip" 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

• The diary records refusals to accept used chips back after fit problems or illness.
• Staff offered cancellation and a refund before dispatch in the June 2023 exchange.
• These entries do not establish today's return terms or whether the historical replacement offer continues.

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: returning a used chip

The material does not describe what the base device, the OK Prostate Chip, is. The entries address refunds after problems with purchased chips, including poor fit, illness, and doubts about the maker's support. They also discuss custom tube devices placed in the urethra and revised flat base plates with openings for the penis head. Mr. Okada's replies distinguish returns after use, exchanges involving replacement parts, and cancellation before an order leaves the company.

Custom chip returns were excluded before a linked design was tried

In an entry published in August 2020, a customer asked about a shark-shaped chip after reporting confidence with the maker's other devices. Mr. Okada described that chip as roughly 50 mm long and suggested a linked pair instead. After making the linked design, he expressed concern about its tight curve and the possibility that it might not fit.

The diary does not record how that customer's linked design fitted. No matching product can be confirmed on the current list. Mr. Okada cautioned that he would not accept a return if it could not be inserted.

(Source: ok-lab's diary, published August 2020)
https://ok-lab.hatenablog.com/entry/2020/08/08/130037

Illness did not lead to approval for returning a used chip

In an entry published in September 2020, a buyer requested a return after problems with two chips. The buyer thought the shark-shaped chip was too large because its rear end stopped at the head of the penis. The buyer reported acute prostate inflammation after using the sea-slug-shaped version 4 chip twice, with a persistent 39℃ fever.

Mr. Okada refused the used-product return; the buyer's September 2020 follow-up reported improvement during antibiotic treatment and acceptance of his decision. No matching product can be confirmed on the current list. Mr. Okada urged early antibiotic treatment and a visit to a urinary-system specialist when fever occurred.

(Source: ok-lab's diary, published September 2020)
https://ok-lab.hatenablog.com/entry/2020/09/12/093836

(Source: ok-lab's diary, published September 2020)
https://ok-lab.hatenablog.com/entry/2020/09/19/123115

A successful earlier design did not make custom chip returns available

In an entry published in September 2020, a customer satisfied with an earlier linked chip requested a version with raised bumps. The previous pair had initially been difficult to fit, according to the customer's report. Mr. Okada accepted the new order before seeing the fired version himself.

The diary does not record how the new version fitted. No matching product can be confirmed on the current list. Mr. Okada cautioned that the new custom chip could not be returned if it did not fit.

(Source: ok-lab's diary, published September 2020)
https://ok-lab.hatenablog.com/entry/2020/09/19/123115

Custom chip returns remained excluded while the maker questioned tube products

In an entry published in August 2022, Mr. Okada described sudden fever after roughly 3 days with a custom tube device continuously in place. He reported 38.5 degrees when he measured his temperature, after feeling that the fever had fallen. He questioned whether the tube was involved but did not establish a cause.

He wrote that further trials had stopped, although he continued making custom orders already accepted by staff. No matching product can be confirmed on the current list. Mr. Okada warned that custom products could not be returned simply because the delivered items proved unusable.

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/20/122920

A cracked base plate prompted another order during chip replacements

In an entry published in April 2023, a customer reported that a newly received flat base plate cracked when worn after personal alteration. The customer then asked to order another version of the flat-plate device. Mr. Okada suggested that the changed arrangement of holes might explain the break, without confirming its cause.

The diary does not record whether the new order was completed. No matching product can be confirmed on the current list. Mr. Okada cautioned elsewhere in the same entry that strong force could break the plate's resin.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/29/123107

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The maker's answer to returning a used chip

The diary describes separate terms for custom-product returns, replacement parts, and cancellation before dispatch.

A possible sales suspension did not promise custom chip refunds

In an entry published in August 2022, Mr. Okada said numerous reports of problems with tube products would lead him to stop selling them. This was a condition for a possible future decision; the entry did not announce that tube-product sales had ended. He also pointed customers toward surgical stainless steel, which he described as safer, without identifying a particular alternative model.

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/20/122920

Chip replacements changed the maker's stated responsibility when new parts arrived

In an entry published in April 2023, Mr. Okada explained what he meant by replacing the older flat base plate. He said his responsibility for the older product ended when the new one arrived. That was his explanation of the replacement arrangement, including cases where customers kept their existing device.

He wrote that requests for the wider-hole version had come from only about half of buyers. He encouraged customers satisfied with the original to request the revised version too.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/29/123107

Refunds were offered before dispatch when support caused concern

In an entry published in June 2023, a buyer who had already paid asked about the company's support arrangements. Staff offered cancellation and a refund before dispatch, while stating that returns and refunds would not be accepted afterward. The buyer later declined cancellation, saying that adequate support after purchase would address the concern.

Mr. Okada still held dispatch pending agreement about the limits of accident-related support, and staff were to seek confirmation by email. The diary does not record whether the order was ultimately dispatched. Mr. Okada advised against purchasing if the available support left the buyer uncomfortable.

(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110

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 returning a used chip changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to returning a used chip

No current product is directly tied to this topic.

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Common worries about returning a used chip

The questions concern what must be returned, replacement durability, and the support available when something goes wrong.

"Does a chip replacement require returning only the base plate?"

In an entry published in April 2023, a buyer asked whether the base plate alone should be sent back. The buyer had wanted either a shallow recess on its inner surface or a larger central opening. Mr. Okada acknowledged that concern and said he should have recognized the issue earlier.

His general explanation said used originals did not need returning, and the offer let buyers compare the older and wider-hole versions. He explained that receiving used items back would create disposal difficulties. Mr. Okada's guidance for the replacement offer was that the existing product could remain with its owner.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/29/123107

"Could the wider opening make chip replacements more fragile?"

In an entry published in April 2023, a buyer considering the replacement worried that its larger opening would make the plate easier to break. Mr. Okada described epoxy (the resin used for the plate) as brittle, but thought the earlier design might be more vulnerable. He attributed that concern to narrow sections between its smaller holes; the wider-hole version had a larger central area around its opening.

He also wrote that older epoxy became stronger over time, making work on older chips more demanding than he had anticipated. His assessment favored the revised layout, but he acknowledged that unexpected force could still cause a break.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/29/123107

"Does the OK Prostate Chip have emergency telephone support?"

In an entry published in June 2023, the buyer asked for a telephone number for emergencies. Staff said there was no emergency telephone service and described email replies within 24 hours as their usual response. Mr. Okada explained that messages were reliably checked only once a day, so a reply could be delayed.

He said sales depended on customers accepting responsibility for use, with limits on what the company could do after an accident. For problems such as a device that could not be removed, he said email assistance depended on when a message was seen. Mr. Okada said hospital care could be necessary when the company could not resolve the problem.

(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110

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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.