How do ceramic A, B, and C orders work? | Named requests through existing listings [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 "ceramic A, B, and C custom orders" 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 handled ceramic A, B, and C as named custom requests through existing product listings.
• Mr. Okada adjusted specifications and charges, sometimes suggesting another shape or declining an unfinished design.
• The current list includes the ceramic listings used in the diary's ordering examples.

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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: ceramic chip custom orders

The OK Prostate Chip is a device placed in the urethra (the urine passage) to act on the prostate. The curved ceramic designs have diary nicknames: ceramic A (Mokushi A), ceramic B (Mokushi B), and ceramic C (Mokushi C). Customers requested these shapes through existing listings, with additional parts attached behind the chip in later custom builds. Those requests raised questions about pricing, fit, cable length, and unfinished designs.

Ceramic chip custom orders originally matched existing twist listings and prices

In an entry published in December 2021, Mr. Okada introduced the ceramic A, B, and C shapes. A matched the price of the long ceramic twist, B the larger ceramic twist, and C the medium-length ceramic twist. The announcement also described their overall sizes as approximately equivalent to those corresponding products.

The ordering arrangement used the company's own online store, with the requested shape identified separately from the selected listing. Mr. Okada instructed customers to purchase the corresponding product and specify the desired letter in the order's comments field.

(Source: ok-lab's diary, published December 2021)
https://ok-lab.hatenablog.com/entry/2021/12/25/123556

Ceramic A custom orders revealed fit trouble immediately after launch

In an entry published in January 2022, a customer reported that a threadless ceramic A chip would not pass the penis tip. The customer suspected the thick thread-connection area and requested the smaller ceramic B instead. This was the customer's explanation, rather than a confirmed cause.

Mr. Okada's reply drew on his own difficulty with A and attributed his experience to orientation. The diary does not record whether the replacement was delivered or how it fitted. His staff cautioned against forcing the chip and described the reply as personal experience.

(Source: ok-lab's diary, published January 2022)
https://ok-lab.hatenablog.com/entry/2022/01/01/124134

Ceramic A custom orders prompted cable-length advice that Mr. Okada later reconsidered

An entry published in April 2022 describes a customer seeking easier retrieval of ceramic A through a support cable (reinforcement behind the chip). Mr. Okada initially warned that 23cm would protrude as the penis shortened because the four-line cable barely shortened. After several requested changes, he accepted 14cm.

His own 11–12cm prototype then led him to reconsider: he thought 17–18cm might have suited this customer. The diary does not record how the customer's completed cable felt in use. Mr. Okada's revised suggestion was that a future build for this customer could be longer.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/09/123458

Motorized ceramic A custom orders required extra payment beyond the selected listing

In an entry published in April 2022, a customer requested a motorized ceramic A chip (a version producing vibration). Mr. Okada quoted ¥9,900 (about $63 at ¥156 = $1, rate as of 2026-09-04), requiring ¥2,200 (about $14 at ¥156 = $1, rate as of 2026-09-04) beyond the product already ordered. The requested raised-bump version was still being fired, with the batch expected to reach OK Lab in 10 days.

The customer dropped the bumps, and the entry records ¥1,650 (about $11 at ¥156 = $1, rate as of 2026-09-04) extra after the order adjustments. Mr. Okada also specified an additional connector charge for the cable arrangement. He explained that retaining the bumps would mean waiting for the batch before construction could begin.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/09/123458

Ceramic chip custom orders gained support cables that held diagonal bends

In an entry published in October 2022, Mr. Okada introduced a floating-wire cable (a cable with wires free inside tubing). He described this four-line design as bending vertically, horizontally, and diagonally while retaining its bent shape. The entry announced discontinuation of the older six-line support cable, although it also recorded an exceptional order accepted afterward.

Prices were ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) up to 10cm, ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) per 1cm above 10cm, and ¥11,000 (about $70 at ¥156 = $1, rate as of 2026-09-04) for 20cm, all excluding tax. Mr. Okada described the design as an improvement but did not claim absolute safety. He advised people with remaining safety concerns not to buy it.

(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/15/123011

Ceramic B custom orders led to a replaceable-wire cable revision

In an entry published in July 2023, a customer asked whether a floating three-line cable could still be made for textured ceramic B. Staff specified 20cm with resin reinforcement (material supporting the assembly), plus 8cm without reinforcement, totaling 28cm. The customer accepted pricing after production, and Mr. Okada made a revised assembly.

Its replaceable wire measured 0.7mm, within tubing measuring 2mm outside and 1mm inside. The finished assembly had 19.5cm of connections spaced 1.5cm apart. Staff requested a specific measurement for any longer proposal, cautioning that construction might still prove impossible after work began.

(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/01/123130

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The maker's answer to ceramic chip custom orders

The diary treated the requested shape, cable, and extra parts as details requiring their own replies and quotes.

Ceramic A custom orders gained cable charges after prototype work

In an entry published in April 2022, a customer asked about the extra charge for a 12cm four-line support cable. The request also specified 15cm of thread. Mr. Okada announced that support work would become chargeable after that entry's publication.

For the requested cable length, the new additional charge was ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04). His reply told this customer that their earlier order still qualified for free prototype work.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/23/123121

Ceramic B custom orders needed cable lengths considered alongside other components

In an entry published in April 2022, a customer requested textured ceramic B with a support cable and an external retaining component. The quote added ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) for raised bumps, ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04) for the compatible cable, and ¥5,500 (about $35 at ¥156 = $1, rate as of 2026-09-04) for the retaining component. Mr. Okada noted that its 25mm tube occupied part of the urethral space.

The customer changed the supported cable length from 14cm to 12cm, and the following two-line section from 5cm to 6cm. Mr. Okada had suggested considering a shorter support section because of the additional tube, depending on the customer's intended arrangement.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/30/123451

Ceramic B custom orders offered one customer a looser alternative

In an entry published in May 2022, a customer wanted to replace ceramic A after difficulty with its 14cm four-line assembly. Mr. Okada again attributed the problem to orientation, and the customer reported success 10 minutes after their conversation. That did not settle the customer's concern about cable length.

The customer still chose textured ceramic B with a 12cm support section because the earlier cable felt too long. The diary does not record how B felt in use. Mr. Okada suggested that the looser B might suit this arrangement, since he considered the support cable helpful for maintaining position.

(Source: ok-lab's diary, published May 2022)
https://ok-lab.hatenablog.com/entry/2022/05/07/123013

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How ceramic chip custom orders changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to ceramic chip custom orders

The current list supplies prices for the ceramic listings used in these historical ordering examples.

Products that appear in these entries

(Source: ok-lab's diary, published January 2022)
https://ok-lab.hatenablog.com/entry/2022/01/01/124134

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/30/123451

(Source: ok-lab's diary, published October 2023)
https://ok-lab.hatenablog.com/entry/2023/10/28/122832

Products the diary mentioned as alternatives

The diary names no alternative.

The entries describe ceramic A, B, and C custom builds, experimental cable assemblies, and an unfinished flat retainer. No matching product can be confirmed on the current list.

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Common worries about ceramic chip custom orders

The recorded questions concern extra charges, custom connections, and whether unfinished designs could be supplied.

"Do ceramic B custom orders need an extra payment?"

In an entry published in April 2022, a customer requested motorized ceramic B with a more distinct chip-to-cable junction. The customer linked the existing junction shape to an uncomfortable urge to urinate during extended wear. Mr. Okada quoted ¥8,800 (about $56 at ¥156 = $1, rate as of 2026-09-04), adding ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) to the selected product's price.

The diary does not record whether a junction change resolved the discomfort. Mr. Okada explained that the 35cm connection length could make the customer's existing controller (the motor's control unit) awkward to use. He proposed a ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) extension cable, which the customer added to the order.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/23/123121

"Could ceramic A custom orders include the unfinished flat retainer?"

An entry published in November 2022 records a request involving ceramic A and a flat retainer (a device intended to keep the penis retracted). The customer wanted a screw-shaped auxiliary chip, with a 20mm gap between the chips. Staff declined because the detailed specifications were still under development, and the customer agreed to wait.

The entry pictured the customer's existing ceramic A assembly. Mr. Okada said he could not fully understand the customer's reported arrangement. He proposed a design with separate chip and retaining components.

(Source: ok-lab's diary, published November 2022)
https://ok-lab.hatenablog.com/entry/2022/11/26/122622

"Why did ceramic C custom orders cost extra?"

In an entry published in October 2023, a customer requested ceramic C through the ordinary medium-length ceramic listing priced at ¥4,400 (about $28 at ¥156 = $1, rate as of 2026-09-04). Mr. Okada explained that C belonged at the twisted version's price. The diary does not record whether the customer paid the difference or received the chip. His answer specified an additional ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) for that request.

(Source: ok-lab's diary, published October 2023)
https://ok-lab.hatenablog.com/entry/2023/10/28/122832

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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.