What do 4-wire and 6-wire cables cost? | The original designs were discontinued [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 cable prices and discontinuation 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

• Original 4-wire and 6-wire cables were withdrawn after reported problems.
• Mr. Okada offered repairs and proposed different cable designs for some requests.
• The current list includes related chips and an extra-cable option, but does not confirm the historical custom cable builds.

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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: 4-wire and 6-wire cable prices

The OK Prostate Chip is a small device placed in the urethra, the urine passage, to act on the prostate. These cables attach to the chip; vibrating versions also connect to an external controller (the power unit). Stiff cable was intended to help the chip advance, while wire-supported cables were designed to retain bends and help maintain its position. Depending on the build, cable sections extended inside and outside the urethra.

An early stiff cable became a paid modification after its first build

In an entry published in October 2019, a customer asked for a firmer cable on a vibrating chip. Mr. Okada offered cable choices, and the customer selected 20 cm of stiff cable followed by standard cable. The first build carried no extra charge, but later requests would cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) excluding tax because the connections required extra work.

The diary does not record how that first cable felt in use. Mr. Okada invited customers to specify their preferred cable.

(Source: ok-lab's diary, published October 2019)
https://ok-lab.hatenablog.com/entry/2019/10/12/125944

A later stiff cable order confirmed the quoted price and length

In January 2020, a customer requested stiff-cable processing for a ceramic vibrating awakening chip. The reply quoted an additional ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04), and the diary records completion with a 20 cm stiff section. No customer assessment of that completed cable appears in this case. Mr. Okada invited requests for a different stiff-section length.

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/11/151714

A longer stiff cable could not accept the parallel-cable stopper

In April 2022, a customer requested thicker, stiffer cable for a medium-length ceramic vibrating chip. A 30 cm stiff section added ¥1,650 (about $11 at ¥156 = $1, rate as of 2026-09-04). The requested parallel-cable stopper (a fitting limiting inward movement) was cancelled. The maker explained that this stopper could not be fitted to the stiff cable.

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/02/123050

Published 4-wire cable prices depended on the reinforced section's length

An April 2022 announcement priced 4-wire cable at ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) excluding tax for up to 10 cm. Each further 5 cm bracket added ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04), through 25 cm. The exceptional 26–30 cm bracket cost ¥7,000 (about $45 at ¥156 = $1, rate as of 2026-09-04) excluding tax, reflecting more difficult production.

The following two-wire section was limited to 10 cm. Mr. Okada directed customers needing greater electrical-cable reach toward extension cables.

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

Pain reports ended regular 4-wire cable sales and changed the names

In June 2022, Mr. Okada announced that the original 4-wire cable was discontinued following reports of pain. The premium 4-wire name was also retired, with 6-wire cable offered at the previous 4-wire price. He said exceptional private requests for the original design could still be considered. However, he warned that repeated extreme bending would eventually break those cables.

(Source: ok-lab's diary, published June 2022)
https://ok-lab.hatenablog.com/entry/2022/06/11/123420

Standard 6-wire cable prices differed from the premium silicone-covered version

The June 2022 announcement also introduced premium 6-wire cable with 1 mm silicone-covered auxiliary wires, meaning the additional insulated wires. The auxiliary-wire side measured approximately 5 mm across. The following historical cable prices excluded tax. Mr. Okada cautioned that additional manufacturing work could limit production and delay delivery.

(Source: ok-lab's diary, published June 2022)
https://ok-lab.hatenablog.com/entry/2022/06/11/123420

New supply specifications threatened the material needed for 6-wire cables

In August 2022, the diary published the cable supplier's explanation of a manufacturing change. Supplies arriving from April 2022 were made in Malaysia, replacing the Chinese-made version. The supplier acknowledged reduced flexibility and approximately 0.1 mm greater thickness, saying it had prioritized maintaining the price.

Mr. Okada considered the change a threat to continued 6-wire production. He asked that requests mainly concern vibrating or electrical-stimulation chips, suggesting wire-containing silicone tubing for support-only purposes.

(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/06/123150

The floating-wire 4-wire cable introduced another design and price schedule

In October 2022, Mr. Okada introduced floating-wire 4-wire cable, with supporting wires housed loosely inside silicone tubes. He described it as capable of bending in different directions while retaining its shape. Its price was ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) excluding tax through 10 cm, then ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) for each additional 1 cm.

The published 20 cm price was ¥11,000 (about $70 at ¥156 = $1, rate as of 2026-09-04) excluding tax, and 20 cm was the maximum. Mr. Okada acknowledged remaining uncertainty and advised people concerned about its risks against purchasing it.

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

A later stiff cable quotation appeared after the original designs disappeared

In November 2024, a custom quotation covered two ceramic vibrating builds with stiff cables. The quoted processing charge was ¥1,650 (about $11 at ¥156 = $1, rate as of 2026-09-04) for a 30 cm stiff section on each build. The diary does not record how these particular cables performed.

(Source: ok-lab's diary, published November 2024)
https://ok-lab.hatenablog.com/entry/2024/11/09/122930

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The maker's answer to 4-wire and 6-wire cable problems

The maker's responses changed with the problem: stiffness, electrical reliability, physical damage, or difficulty keeping the chip in position.

Stiff cable pricing did not remove the maker's handling reservations

In February 2022, a customer asked about stiff-cable cost and whether the controller would be separate. Mr. Okada quoted ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) excluding tax per 10 cm, with 20 cm costing ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04), followed by ordinary cable. The controller remained attached; separation required a USB connector (a detachable electrical connection) option.

The supplied exchange records no completed order. Mr. Okada generally discouraged stiff cable because it was awkward to handle and suggested a separate supporting wire instead.

(Source: ok-lab's diary, published February 2022)
https://ok-lab.hatenablog.com/entry/2022/02/26/123231

Premium 6-wire cable was proposed when auxiliary wires carried current

In June 2022, Mr. Okada distinguished current capacity from durability over time. He wrote that ordinary 6-wire cable could develop an internal electrical break during prolonged use. For builds carrying current through the auxiliary wires, he recommended the premium version with AWG30 wires, a size designation the diary does not explain.

(Source: ok-lab's diary, published June 2022)
https://ok-lab.hatenablog.com/entry/2022/06/11/123420

Early 6-wire cable damage prompted repair offers and suspended sales

In October 2022, a customer reported resin coming loose at one point around the bundled wires. Mr. Okada offered a free repair, but the customer replied that they would monitor its condition. The diary does not record whether that repair subsequently happened.

The announcement suspended 6-wire sales after problems arising relatively soon after use began. Mr. Okada also offered refunds to buyers who objected to the products' risks.

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

An additional cable was suggested when 6-wire supply had stopped

In November 2022, a customer sought help because they struggled to advance a medium-length ceramic vibrating chip. The reply stated that 6-wire cable was then unavailable. No assessment of the resulting build appears in the supplied passage. For this request, the maker proposed a two-cable arrangement using an additional cable.

(Source: ok-lab's diary, published November 2022)
https://ok-lab.hatenablog.com/entry/2022/11/19/122516

A reinforced cable was proposed for an earlier 4-wire customer's concern

In June 2023, a customer asked whether a previously comfortable 4-wire vibrating-chip build could still be made. Mr. Okada described a different cable with a 5 mm flexible section beside the chip and 1.2 mm stainless-steel reinforcement. The supporting wire had rounded ends as a precaution against separation from the electrical cable.

The additional prices excluded tax: ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) for 6 cm, ¥2,500 (about $16 at ¥156 = $1, rate as of 2026-09-04) for 8 cm, and ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) for 10 cm of reinforcement. Mr. Okada proposed this approach when retaining the chip's position was the reason for requesting the earlier 4-wire design.

(Source: ok-lab's diary, published June 2023)
https://ok-lab.hatenablog.com/entry/2023/06/10/123053

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How 4-wire and 6-wire cables changed over time

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OK Prostate Chip products related to 4-wire and 6-wire cables

These current listings identify related base products and an alternative option; they do not establish availability of the historical cable modifications.

Products that appear in these entries

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/11/151714

(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/02/123050

Products the diary mentioned as alternatives

(Source: ok-lab's diary, published November 2022)
https://ok-lab.hatenablog.com/entry/2022/11/19/122516

Original 4-wire and 6-wire cables: the January 2023 entry explicitly states that sales of both had stopped following fault reports.

(Source: ok-lab's diary, published January 2023)
https://ok-lab.hatenablog.com/entry/2023/01/07/123115

Historical stiff-cable builds, premium 6-wire cable, floating-wire 4-wire cable, reinforced cable, and jointed two-wire cable: No matching product can be confirmed on the current list.

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Common worries about 4-wire and 6-wire cables

The diary answers historical ordering questions, but later replies also document refusals and alternatives.

"How were custom 4-wire cable orders quoted?"

In June 2022, a customer asked how to order a support-cable arrangement because their earlier chip shifted. The reply quoted ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04) for the requested 12 cm 4-wire section, separately from another accessory. The passage does not record the customer's experience with the completed arrangement. At that time, the maker directed custom enquiries to email or the order's comments box for a quotation.

(Source: ok-lab's diary, published June 2022)
https://ok-lab.hatenablog.com/entry/2022/06/04/123036

"Why was my 6-wire cable request put on hold?"

The June 2022 announcement addressed a customer who wondered why their custom request had been refused. Mr. Okada explained that all affected customers had been asked to wait for the forthcoming cable announcement. The supplied passage does not record that customer's eventual choice. He asked customers to review the new options and submit a complete description of their final request.

(Source: ok-lab's diary, published June 2022)
https://ok-lab.hatenablog.com/entry/2022/06/11/123420

"Could a discontinued 6-wire cable be replaced in a new order?"

In April 2023, a customer requested a multi-motor build with premium 6-wire cable. The reply said 6-wire sales had ended. The quotation instead listed jointed two-wire sections: 1 cm for ¥550 (about $4 at ¥156 = $1, rate as of 2026-09-04) and 8 cm for ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04).

The diary does not record how that proposed arrangement performed. For this request, the maker proposed the jointed two-wire arrangement as the alternative.

(Source: ok-lab's diary, published April 2023)
https://ok-lab.hatenablog.com/entry/2023/04/22/123057

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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.