![Will a resin screw chip stick? | The maker reported less sticking, but size mattered [OK Prostate Chip]](/img/a/T0804/eyecatch.svg)
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 "resin chip sticking" 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.
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 less sticking with resin screw chips, although a larger version moved less during use.
- He favored screw designs for short resin chips and discouraged other all-white resin shapes because of sticking.
- No matching product can be confirmed on the current list.
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.
Before you read: key terms
| Term | Plain-English meaning |
|---|---|
| Urethra | The urine passage; these entries discuss it as the location where the chip sits and moves. |
| Resin chip | A chip made from resin, a material used for the flat and screw designs discussed here. The diary does not explain its composition. |
| Screw design | The shape used for the resin chips discussed here; Mr. Okada credited it with reducing sticking and allowing small movements. |
| Sticking | A chip clinging to the passage's inner lining; this is the problem Mr. Okada says the screw design addresses. |
| Vibrating chip | A chip that produces vibration; Mr. Okada proposed that movement as another way to interrupt contact with the lining. |
What happens: resin chip sticking
The OK Prostate Chip is a small device placed inside the urethra (the urine passage) to act on the prostate. A resin screw chip uses a screw-shaped resin body, which sits inside that passage. Mr. Okada discusses the design as a way to reduce sticking against the lining while allowing small movements. His entries also describe how larger dimensions and a curve changed the experiences reported by him or a customer.
Mr. Okada linked resin chip sticking to older flat designs
In an entry published in July 2018, Mr. Okada explained why he had previously opposed leaving resin chips in place for long periods. He said older, flat resin plates could readily cling to the lining inside the urine passage. When the passage became dry, he found them harder to remove and believed that sticking could damage the lining.
He also recalled discomfort developing after about half a day, despite initially pleasant sensations. This earlier experience had made him hesitate to praise the new screw design immediately. His later endorsement specifically concerned short resin chips that could use that design.
(Source: ok-lab's diary, published July 2018)
https://ok-lab.hatenablog.com/entry/20180714/1531551648
A larger screw design complicated the answer to resin chip sticking
In a separate entry published in July 2018, Mr. Okada qualified his earlier praise after trying a larger resin screw chip himself. The item came from an unsuccessful attempt to make a 40 mm custom order; the diary does not specify which dimension that figure describes. He described its pressure as effective but found that the large chip moved little when left in place.
He believed this reduced the small movements that gave the screw design its particular appeal. No matching product can be confirmed on the current list. Mr. Okada cautioned that differences in the size of each person's urine passage could affect the experience.
(Source: ok-lab's diary, published July 2018)
https://ok-lab.hatenablog.com/entry/20180721/1532152353
By December, Mr. Okada described substantially reduced resin chip sticking
In an entry published in December 2018, Mr. Okada returned to the effect of shape on resin chips. He described the screw design as greatly reducing sticking, which he said had made longer periods with a chip in place possible. He contrasted that assessment with his earlier view that resin's increased friction in a dry urine passage made extended use unsuitable.
The diary does not specify how long those extended periods were in this passage. His explanation continued to favor the screw shape as an answer to the sticking problem he had associated with resin.
(Source: ok-lab's diary, published December 2018)
https://ok-lab.hatenablog.com/entry/20181222/1545459719
A custom curved design added fit to the resin chip sticking discussion
In an entry published in November 2023, a customer reported on a previously ordered, slightly enlarged, curved resin screw chip. They described a close fit and said it stayed in place for about 1 week, even during forceful urination. Mr. Okada attributed its reportedly excellent staying power to the twist, curve, considerable width, and white resin's limited ability to slide.
The customer proposed a further trial of about 1 month; the diary does not record whether that happened. No matching product can be confirmed on the current list. Mr. Okada said the chip would be particularly impressive if a month of continuous use caused no muscle tiredness.
(Source: ok-lab's diary, published November 2023)
https://ok-lab.hatenablog.com/entry/2023/11/11/122638
The maker's answer to resin chip sticking
Mr. Okada favored screw-shaped short resin chips, also discussed vibration, and continued to express reservations about other all-white resin shapes.
Mr. Okada favored short screw designs for reducing resin chip sticking
In an entry published in July 2018, Mr. Okada said his own resin screw chip had remained in place for 1 week without trouble. He reported that the screw design had removed his concern about sticking, changing his previously unfavorable opinion of resin. He also described its initial smoothness as comparable to a glass chip.
He suggested resin might even be preferable when considering safety and durability; that was his judgment from his experience. The diary does not record whether the same result occurred for other users of that chip. His conclusion was that resin was sufficient for short chips capable of using the screw design.
(Source: ok-lab's diary, published July 2018)
https://ok-lab.hatenablog.com/entry/20180714/1531551648
Vibration became another proposed answer to resin chip sticking
In an entry published in December 2018, Mr. Okada also discussed a vibrating chip (a chip that produces vibration). He believed its movement separated it from the inner lining and therefore prevented sticking. He reported easier removal with vibration, including for a large chip, but presented this as his own observation.
No matching product can be confirmed on the current list. His proposed alternative relied on movement interrupting contact with the lining, rather than on a different material.
(Source: ok-lab's diary, published December 2018)
https://ok-lab.hatenablog.com/entry/20181222/1545459719
Mr. Okada still associated other white shapes with resin chip sticking
In a reply published in March 2022, Mr. Okada said he generally did not recommend chips made entirely from white resin without a screw design. He believed those other shapes were prone to sticking. His reservation therefore remained in place after his earlier favorable report about a resin screw chip.
He also acknowledged that keeping a chip in place could lead to a different judgment about the material. His reply retained the caution about non-screw white resin shapes while recognizing the customer's different priority.
(Source: ok-lab's diary, published March 2022)
https://ok-lab.hatenablog.com/entry/2022/03/05/123200
How resin chip sticking changed over time
| Published | What the diary said then |
|---|---|
| Jul 2018 | Mr. Okada favored resin after a week with a screw chip reportedly caused no trouble. |
| Jul 2018 | A larger custom chip moved less, weakening the benefit Mr. Okada associated with screws. |
| Dec 2018 | Mr. Okada also proposed vibration to prevent sticking by interrupting contact with the lining. |
| Mar 2022 | Mr. Okada still discouraged all-white resin shapes without a screw design because of sticking. |
| Nov 2023 | Mr. Okada attributed a custom chip's staying power to shape, width, and limited sliding. |
The diary does not say what the current state is.
OK Prostate Chip products related to resin chip sticking
No current product is directly tied to this topic.
Common worries about resin chip sticking
The recorded request concerns a larger white resin screw chip with a particular balance of sliding and grip.
"Can a larger resin screw chip provide my preferred fit?"
In an entry published in March 2022, a customer requested a larger white resin screw chip because white resin best balanced sliding, fit, and resistance. After trying glass, ceramic, white resin, and a blue chip, they found ceramic too slippery and the blue chip too tight. They requested a length of 35–38 mm and maximum thickness of 10–13 mm, accepting some variation.
No matching product can be confirmed on the current list. The diary does not record whether the requested order was completed or how a finished chip felt in use. Mr. Okada considered the comparison perceptive, while retaining his caution about white resin shapes without a screw design.
(Source: ok-lab's diary, published March 2022)
https://ok-lab.hatenablog.com/entry/2022/03/05/123200
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.
Summary of this article
| What you wanted to know | The answer |
|---|---|
| What is the short answer? | Mr. Okada favored the screw design for resin, with reservations about larger sizes and other shapes. |
| What is this product? | A device placed in the urine passage, made by OK Lab in Japan and priced in Japanese yen. |
| What do the terms mean? | The screw design and vibration are the two approaches Mr. Okada associated with reduced sticking. |
| What happened in these reports? | Mr. Okada described less sticking; size and shape also affected movement and staying in place. |
| What was the maker's answer? | He favored short resin screw chips but continued to discourage other all-white resin shapes. |
| What changed over time? | Later entries added a size caveat, vibration, and a customer's report about a wider, curved custom chip. |
| Which current product matches these cases? | No matching product can be confirmed on the current list. |
| What did the customer request? | A larger white resin screw chip with the balance of sliding and grip they preferred. |
| How do overseas orders work? | Advance PayPal payment, a ¥400 (about $3 at ¥156 = $1, rate as of 2026-09-04) handling fee, and additional EMS shipping under the stated terms. |
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.
This article is a summary of the maker's development diary. The product is not a medical device and no result is guaranteed. If anything feels wrong or worries you, see a doctor. Prices, specifications and cautions change, so confirm the latest information on the official blog and the official site. Questions about ordering and shipping go to the seller.