![What is the Cool Beads chip? | A bendable metal core with flat beads [OK Prostate Chip]](/img/a/T0605/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 "what is the Cool Beads 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.
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 beaded chip (Cool Beads chip) has flat beads on a bendable metal core (an inner wire).
- Mr. Okada describes limits to bending and to the custom connections he can offer.
- No matching product can be confirmed on the current list.
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.
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, where the maker describes the chip sitting and providing stimulation. |
| Metal core | The inner stainless-steel wire supporting the beads and giving the chip its bendable structure. |
| Epoxy resin | The material forming the beads around the wire; it provides the chip's flattened body sections. |
| Silicone tubing | A covering around the wire between beads, covering the spaces that separate them. |
| Retrieval thread | A thread intended for retrieving the chip; the maker warns that retrieval can fail. |
| Flat wire-and-tube attachment | A device with firm and flexible sections, discussed as an attachment connected to the chip. |
| Blue Safety | The diary's name for a connector between the chip and the flat wire-and-tube attachment. |
What happens: Cool Beads chip
The OK Prostate Chip is a device intended to sit in the urethra (the urine passage) and provide stimulation. The bendable metal-core version (Cool Beads chip) has flattened resin beads along an inner wire, with covered spaces between them. In the June 2023 entry, Mr. Okada links its adjustable shape to stimulation and its ability to stay in place. The nickname reflects his impression of the pale blue beads and transparent-looking core.
The Cool Beads chip introduced thinner beads around a metal core
In an entry published in June 2023, Mr. Okada explains why he developed the flattened beads. His preceding design combined cord and wire, making the finished chip about 5 mm thick. He believed 4 mm thickness and 8 mm width would suit most people with a narrow urethra.
The prototype's disc-shaped beads were thickest at their centers and became thinner toward their edges. Mr. Okada also cautions that individual urethral width affects how a curved chip behaves.
(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110
The Cool Beads chip core used tubing between uncovered bead joints
In an entry published in June 2023, the core used 1.2 mm stainless-steel wire. Silicone tubing (the wire's covering) had an inner diameter of 1 mm and an outer diameter of 2 mm. It covered the gaps, roughly 5 mm long, but not the places where beads joined the wire.
The end beads were fixed firmly, while the middle beads had some rotational movement. Mr. Okada suggests seeing that movement as a feature of the middle beads.
(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110
Three- and four-bead Cool Beads chip versions had different launch prices
In June 2023, the three-bead version measured just under 4 cm and cost ¥5,000, (about $32 at ¥156 = $1, rate as of 2026-09-04) tax excluded. The four-bead version measured just under 5 cm and cost ¥6,000, (about $38 at ¥156 = $1, rate as of 2026-09-04) tax excluded.
The beads across the listed versions were 3.5 mm–4 mm thick and 7.5 mm–8 mm wide. These were the specifications and prices published with the launch announcement. Mr. Okada proposed length as the choice between versions, with consistent bead dimensions.
(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110
Five- and six-bead Cool Beads chip versions extended the original range
In June 2023, the five-bead version measured just under 6.5 cm and cost ¥7,000, (about $45 at ¥156 = $1, rate as of 2026-09-04) tax excluded. The six-bead version measured just under 8 cm and cost ¥8,000, (about $51 at ¥156 = $1, rate as of 2026-09-04) tax excluded. These descriptions specify five and six flat beads respectively.
Mr. Okada explains that earlier designs had generally stopped at about 6 cm because their curve angles were fixed. He reports that an approximately 8 cm prototype with an adjustable curve stayed in place during his own trial. His caution was that results depended on the individual's urethral width.
(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110
A sharply curved Cool Beads chip could become difficult to retrieve
In an entry published in June 2023, Mr. Okada describes his own trial of a sharply curved chip. He reports that curves of 90 degrees to 110 degrees barely moved during urination in that trial. He presents this as an experience affected by individual anatomy.
His warning concerned a sharply curved chip forced into the bladder: retrieval by its thread might then fail. He also considered passage during urination unlikely in that situation. Mr. Okada warns that hospital care could be necessary.
(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110
The maker's answer to Cool Beads chip questions
Mr. Okada describes limits to repeated bending, tool use, and direct connections between separate parts.
Repeated bending could leave the Cool Beads chip permanently uneven
The June 2023 entry describes a core capable of both vertical and horizontal curves. Mr. Okada says repeated bending and straightening could leave the wire unable to return to a completely straight shape.
He notes that examples photographed after strong bending already looked somewhat uneven. His preference, for preserving appearance, was a consistent curve direction rather than repeated changes between directions.
(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110
Tool force could crack or detach Cool Beads chip resin
The resin beads were another limitation discussed in the June 2023 entry. Mr. Okada warns that force from tools could crack or detach the epoxy resin (the material forming the beads).
He had not tested a twisted version and described that possibility only as speculation. Mr. Okada advises against using tools to reshape the chip.
(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/24/123110
Direct Cool Beads chip connections raised knot and coating concerns
In an entry published in September 2023, a customer asked for a direct connection without an intermediate resin chip. Mr. Okada understood this as a possible nylon-thread connection to the flat wire-and-tube attachment.
He warned that an exposed knot could cause an uncomfortable sensation in the urethra. Although he mentioned rubber coating, he cautioned that concentrated force from the thin thread could reduce the coating's durability.
(Source: ok-lab's diary, published September 2023)
https://ok-lab.hatenablog.com/entry/2023/09/09/122848
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.
How the Cool Beads chip changed over time
| Published | What the diary said then |
|---|---|
| Jun 2023 | A thinner flat-bead prototype followed the combined cord-and-wire design. |
| Jun 2023 | A covered steel core supported beads with some movement at the middle. |
| Jun 2023 | Launch prices varied with bead count and overall length. |
| Jun 2023 | Repeated bending and tool use raised separate concerns about shape and resin damage. |
| Jun 2023 | The maker reported strong retention but warned about possible failed retrieval. |
| Sep 2023 | The blue connector was accepted; direct knots raised comfort and durability concerns. |
| Sep 2023 | An integral extension conflicted with the flat attachment's construction; a separate build remained conditional. |
The diary does not say what the current state is.
OK Prostate Chip products related to the Cool Beads chip
No current product is directly tied to this topic.
Common worries about the Cool Beads chip
The customer questions concern connections, a proposed combined design, and its possible cost.
"Can the Cool Beads chip connect to a flat attachment?"
In an entry published in September 2023, a customer requested a six-bead chip connected to a flat wire-and-tube attachment. The request specified a 10 cm firm section, 6 cm flexible section, and 30 cm retrieval thread (a thread intended for retrieval).
The September 2023 follow-up changed the firm section to 8 cm and requested two 35 cm threads. The diary does not record whether this connector-based order was completed. Mr. Okada accepted the blue connector (Blue Safety, the diary's connection part) as a workable connection between the chip and attachment.
(Source: ok-lab's diary, published September 2023)
https://ok-lab.hatenablog.com/entry/2023/09/09/122848
(Source: ok-lab's diary, published September 2023)
https://ok-lab.hatenablog.com/entry/2023/09/16/122723
"Can the Cool Beads chip share an attachment's metal core?"
In the follow-up published in September 2023, the same customer proposed a continuous wire core extending from the beads into a tube-covered attachment. Mr. Okada replied that his flat attachment requires fully enclosed wire with a central U-shaped bend. He says a continuous wire extension beyond its end cannot meet that definition.
Mr. Okada considers the middle bend essential to preventing the wire and tubing from shifting independently. He invites other design proposals for consideration, while explaining that the requested structure would be a different product.
(Source: ok-lab's diary, published September 2023)
https://ok-lab.hatenablog.com/entry/2023/09/16/122723
"Could a simpler Cool Beads chip custom build cost less?"
In the follow-up published in September 2023, the customer also asked whether a simpler combined wire-and-tube design could be cheaper. The diary does not record a price for that custom proposal. Mr. Okada says he could not offer a technical guarantee against movement between the wire and tubing in such a design.
The diary does not record whether the proposed combined device was completed or how it felt in use. Mr. Okada asks for detailed specifications before considering whether that separate build would be feasible.
(Source: ok-lab's diary, published September 2023)
https://ok-lab.hatenablog.com/entry/2023/09/16/122723
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? | This is a flat-bead design with a bendable metal core and documented limitations. |
| What is the base product? | The OK Prostate Chip is a urethral device made and sold by OK Lab in Japan. |
| What do the technical terms mean? | The core supports the beads; tubing covers the gaps; a separate connector joins an attachment. |
| What did the maker introduce? | The June 2023 announcement described thinner beads, several lengths, and prices varying by bead count. |
| What limits did the maker identify? | Repeated bending could affect shape, tools could damage resin, and direct thread connections raised concerns. |
| What changed over time? | The June 2023 design announcement was followed by September 2023 discussions about custom connections. |
| Is there a confirmed current product? | No matching product can be confirmed on the current list. |
| What did the customer questions establish? | A connector-based arrangement was accepted; a continuous-core custom build remained conditional, with no recorded completion. |
| How does international buying work? | The stated terms specify advance PayPal payment, a ¥400 (about $3 at ¥156 = $1, rate as of 2026-09-04) handling fee, and additional EMS shipping charges. |
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.