Can I get a refund for a broken chip? | Refunds were offered, with limits [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 for early defects and breakage" 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

Customers reported delivery damage, early breakage, and surface problems, sometimes involving injury.

The maker offered refunds, replacements, or repairs according to the case, sometimes declining replacement.

The latest entry offered a refund because the replacement size was unavailable.

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: prostate chip refunds

The OK Prostate Chip is a small device placed in the urethra, the urine passage, to act on the prostate. The problems discussed here affect the chip itself or attached parts, including surface coverings, cables, and wires inside tubing. Refunds were offered for some delivery damage, early breakage, and finishes that customers found unacceptable. Other entries describe replacement or repair offers, depending on the reported problem and what the maker could provide.

Repeated delivery damage brought several options for a broken chip

In an entry published in July 2019, a customer's ceramic semi-long chip and its replacement both arrived broken. The customer requested a more reliable shape after 2 failures despite apparently intact packaging. Mr. Okada offered a refund, stricter packaging, a thicker remake, or another product.

The customer chose the thicker remake; the diary does not record its arrival. Mr. Okada asked for about 5 weeks to produce it.

(Source: ok-lab's diary, published July 2019)
https://ok-lab.hatenablog.com/entry/2019/07/20/151609

One damaged chip brought a refund offer when replacement was impossible

An entry published in October 2019 describes a customer requesting replacement of a long curved ceramic chip. The customer reported bleeding associated with raised resin (material covering an attachment), followed later by breakage of the ceramic core. Mr. Okada questioned the proposed bleeding cause and said he could not judge the ceramic without consulting the potter.

He could not provide a replacement meeting the request; the diary does not record completion of the refund. Mr. Okada proposed refunding the damaged chip instead.

(Source: ok-lab's diary, published October 2019)
https://ok-lab.hatenablog.com/entry/2019/10/05/141806

An internally broken chip brought replacement or refund options

In an entry published in February 2020, a customer asked whether their use had caused a sea-slug-shaped chip to break internally. They reported breakage at its bend after several uses, without an impact. The customer reported no injury.

Mr. Okada suspected an individual strength problem because another specimen resisted his check. He offered replacement or refund, and the customer requested another identical chip.

(Source: ok-lab's diary, published February 2020)
https://ok-lab.hatenablog.com/entry/2020/02/01/151232

A glass chip refund followed breakage during its second use

In an entry published in February 2020, a customer requested a refund after a glass chip broke during its 2nd use. The break occurred at its narrowest section beneath the resin, where the customer could not inspect for cracks. The customer reported that the fragment came out 4 hours later.

OK Lab accepted the case as an initial defect, and the customer welcomed the proposed response. OK Lab requested bank details to refund the original bank-transfer payment.

(Source: ok-lab's diary, published February 2020)
https://ok-lab.hatenablog.com/entry/2020/02/15/144151

One broken chip replacement came with a lower angle limit

In an entry published in December 2024, a customer reported a broken internal wire after 2 days with a 120-degree wire-and-tube device, called chipless. Mr. Okada suspected a weak point created during manufacture and offered refund or replacement. The customer chose replacement and asked about returning the damaged item.

Mr. Okada arranged a return envelope with the replacement. He limited replacement and subsequent production to a maximum 90-degree bend for the time being.

(Source: ok-lab's diary, published December 2024)
https://ok-lab.hatenablog.com/entry/2024/12/14/122948

An unexplained broken chip prompted refund instead of identical replacement

In an entry published in February 2025, a customer requested stronger wire after a chipless device broke within 2 weeks. OK Lab could not identify the cause and proposed a refund. The customer initially asked for an identical replacement.

OK Lab explained that the same design might fail quickly again, and the customer accepted the refund. OK Lab advised refunding first because the arrival date for newly sourced, factory-curved wire was unknown.

(Source: ok-lab's diary, published February 2025)
https://ok-lab.hatenablog.com/entry/2025/02/08/122932

An exposed stopper wire led to another chip refund offer

An entry published in November 2025 describes bleeding followed by discovery of an exposed wire in an integrated stopper (a stopper built into the chip). Mr. Okada acknowledged that the rear attachment could slip under sufficient force. He initially had no solution and offered a refund because remaking it could reproduce the problem.

The diary does not record whether that refund was completed. Mr. Okada asked customers to report similar slippage.

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

An unavailable replacement size determined the latest faulty chip refund

In an entry published in June 2026, a customer requested initial-defect support for a cracked 3D-printed chip, nicknamed Kyoaku Zoro. Close photographs showed cracks following the printed layers. OK Lab could not determine the cause but accepted initial-defect treatment.

The M size was out of stock, with no known restocking date, so replacement was unavailable. OK Lab requested the broken item's return for examination and offered a refund.

(Source: ok-lab's diary, published June 2026)
https://ok-lab.hatenablog.com/entry/2026/06/27/122906

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The maker's answer to prostate chip refunds

The maker's responses included refunds, repairs, design changes, and temporary sales suspensions.

Broken chip reports prompted thicker ceramic designs and suspended sales

In an entry published in July 2019, Mr. Okada recorded 2 further ceramic semi-long trouble reports. He temporarily suspended sales and announced a 50% thickness increase. New molds had been sent to the potter.

One report concerned a chip breaking under slight force during cleaning. For that customer, Mr. Okada arranged a thicker remake and asked them to wait for production.

(Source: ok-lab's diary, published July 2019)
https://ok-lab.hatenablog.com/entry/2019/07/27/130537

An exposed cable made faulty chip repair the maker's response

In an entry published in April 2020, a customer asked about exposed copper after approximately 5 uses of a ceramic chip with an attached cable. Mr. Okada acknowledged that the outer covering could slip even while the inner wire remained attached. He considered continued use undesirable.

The diary does not record the completed repair or its performance. Mr. Okada requested return of the item for reinforcement.

(Source: ok-lab's diary, published April 2020)
https://ok-lab.hatenablog.com/entry/2020/04/11/151453

Early failures widened chip refund offers and stopped sales

In an entry published in October 2022, Mr. Okada temporarily stopped selling the 6-wire design and the wire attachment nicknamed pessary. Recent failures had occurred soon after use began. He wrote that safety could not be assured.

He also said converting the attachment required more work than making a new item. Mr. Okada offered refunds to buyers who objected to these products being sold.

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

Further broken chip reports shifted advice toward double-wire products

In an entry published in March 2025, Mr. Okada counted the 4th reported wire-breakage case. He withdrew his expectation that factory-curved wire would eliminate breakage. His proposed double-wire design (a design containing two wires) was intended to keep almost the same curve if one broke.

He acknowledged that factory-shaped wire could still break depending on handling. Mr. Okada strongly recommended double-wire products to customers who had already experienced breakage.

(Source: ok-lab's diary, published March 2025)
https://ok-lab.hatenablog.com/entry/2025/03/08/123016

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 prostate chip refunds changed over time

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OK Prostate Chip products related to prostate chip refunds

The current list provides prices for several named chip types appearing in these reports.

Products that appear in these entries

(Source: ok-lab's diary, published July 2019)
https://ok-lab.hatenablog.com/entry/2019/07/27/130537

(Source: ok-lab's diary, published October 2019)
https://ok-lab.hatenablog.com/entry/2019/10/05/141806

(Source: ok-lab's diary, published April 2020)
https://ok-lab.hatenablog.com/entry/2020/04/11/151453

Products the diary mentioned as alternatives

The diary names no alternative.

Custom sea-slug versions, early chipless builds, the double-wire design, and the integrated stopper: No matching product can be confirmed on the current list.

The precise 3D-printed version nicknamed Kyoaku Zoro: No matching product can be confirmed on the current list.

Sales of the 6-wire design and pessary attachment were temporarily stopped in October 2022. The diary does not say what the current state is.

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Common worries about prostate chip refunds

"Can surface marks qualify for a chip refund?"

In an entry published in April 2020, a customer requested exchange of an unopened single-chip resin model with apparent scratches. Mr. Okada described indentations and wrinkles formed as the resin hardened. He said a remake could not guarantee a flawless finish, and the customer accepted his explanation.

For customers still uneasy, Mr. Okada proposed return and refund instead of exchange.

(Source: ok-lab's diary, published April 2020)
https://ok-lab.hatenablog.com/entry/2020/04/11/151453

"Can a chip refund cover an uneven ceramic surface?"

In an entry published in May 2020, a customer asked about unevenness and a catching edge on a sea-slug-shaped ceramic chip. Mr. Okada said the cause remained unknown despite investigation with the potter. Remaking it would not resolve the problem at that time.

The diary does not record the customer's choice. Mr. Okada offered return and refund if the finish caused concern.

(Source: ok-lab's diary, published May 2020)
https://ok-lab.hatenablog.com/entry/2020/05/30/125906

"Could a chip refund apply without an accepted defect?"

In an entry published in October 2021, a customer reported painful raised areas on a sea-slug version 4 chip. OK Lab judged the photographed resin within its standards and suspected the body shape instead. The diary does not record an inspection result.

OK Lab advised return for inspection: thread replacement if defective, or refund if judged within standards.

(Source: ok-lab's diary, published October 2021)
https://ok-lab.hatenablog.com/entry/2021/10/09/125823

"Can a chip refund cover unexplained black residue?"

In an entry published in May 2025, a customer asked about black, oily material coming from a stainless-steel ring. OK Lab said this was its first such report and could not identify the substance or cause. The customer chose to keep the item.

OK Lab offered return and refund if the residue persisted after cleaning or the customer remained concerned.

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

"Will an older broken chip qualify for replacement?"

In an entry published in May 2025, a customer requested replacement of a broken chipless device ordered in January 2025. OK Lab declined because too much time had passed since shipment, and the customer accepted that decision. It acknowledged that the stronger wire then used could still break with prolonged use.

OK Lab advised that replacement for an initial defect would not cover items long after shipment.

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

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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.