Can't find an IC controller replacement? | Supply and compatibility changed [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 "IC controllers and supply problems" 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

• IC controllers (units that vary motor vibration) faced shortages, broken parts, and failed electronics.
• Mr. Okada offered substitutes and limited controller choices for particular motors.
• The current product list includes the IC controller upgrade and USB connector option.

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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: IC controller replacement

The OK Prostate Chip is a small device placed in the urethra so that it acts on the prostate. The vibrating chip has a motor attached, while the IC controller supplies changing vibration patterns through its cable. In the diary's detachable arrangements, a USB connector (a cable connection between chip and controller) sits along that cable. Mr. Okada sourced controllers from other companies' products, so changing supplies affected what he could offer.

IC controller testing exposed intermittent faults in an 8mm motor

In an entry published in February 2019, Mr. Okada described an 8mm motor that sometimes failed to restart. He found that certain stopping positions caused the problem; slight vibration made the affected motor run again. An IC controller's pause patterns reproduced the fault during testing.

Other 8mm motors had not stopped during those tests, so he had not established a batch-wide fault. Mr. Okada offered individual support for products showing the same problem.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

IC controller supply depended on products OK Lab could buy

In an entry published in February 2019, Mr. Okada said OK Lab could not manufacture IC controllers. He relied on controller parts from commercially sold vibrators, with extra reinforcement at the connection. The IC option added ¥2,000, (about $13 at ¥156 = $1, rate as of 2026-09-04) tax excluded, to the planned vibrating-chip price.

Mr. Okada reported frequent discontinuations among those retail products and said suppliers in China could change their offerings. If those products disappeared, he said OK Lab could no longer supply the controllers. He therefore kept a simple on/off battery box as standard and offered IC control separately.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

A cheaper IC controller source delivered broken battery covers

In an entry published in May 2019, Mr. Okada described switching suppliers after the previous product rose by about ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04). On May 22, he opened 3 controllers, all with broken battery-cover parts. The covers would not hold properly with batteries inside, making the entire first shipment from his second-choice supplier defective.

The seller acknowledged a defective batch caused by damage to its production mold. It promised replacement covers after repairs, but the diary does not record whether those replacements arrived. Mr. Okada also urged the seller to check its remaining stock.

(Source: ok-lab's diary, published May 2019)
https://ok-lab.hatenablog.com/entry/2019/05/25/144939

USB controller launch prices came with uncertain parts supply

An entry published in December 2019 introduced a 4.5V USB rechargeable controller alongside the 3V battery model. The controller itself was ¥2,000, (about $13 at ¥156 = $1, rate as of 2026-09-04) tax excluded; with the USB connector, it was ¥2,500, (about $16 at ¥156 = $1, rate as of 2026-09-04) tax excluded. Mr. Okada preferred its 20 vibration modes (programmed patterns), which he found simpler than the earlier controller's rhythms.

He also reported stronger vibration and warming to around body temperature during heat tests. There was no service to connect this model directly to the chip. Because parts availability remained uncertain, Mr. Okada offered it only by custom order at that stage.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/07/162608

Matching IC controller listing photos concealed different hardware and functions

In an entry published in January 2020, Mr. Okada described buying apparently identical USB controllers from two sellers. Both listings used the same photograph, but the delivered units differed in appearance and function. Neither included instructions, which had made him hesitant to explain their operation.

He also reported that computer sleep could interrupt charging, so a stopped charging light did not necessarily mean a full battery. His explanation applied only to the USB rechargeable controller he was supplying at that time.

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/04/155235

USB controller shortages forced another model change and threatened sales

In an entry published in July 2020, Mr. Okada said deliveries of the existing USB rechargeable controller had stopped completely. He changed to another type with about 10 vibration patterns. He reported similar durability in his tests and no failures so far.

However, its purchase price had risen far above OK Lab's selling price. He warned that sales might pause after stock ran out unless supplier prices fell. Mr. Okada said battery-powered IC controllers could still be supplied for the time being through direct imports from China.

(Source: ok-lab's diary, published July 2020)
https://ok-lab.hatenablog.com/entry/2020/07/18/124343

A 6mm motor failed with incompatible IC controller types

In an entry published in January 2022, Mr. Okada reported a specified operating range of 2.7V–3.3V for the 6mm motor. At about 5V, it became hot enough to burn within 20 seconds in his tests. The motor stopped at 2.5V or below and broke when the supply rose again.

Both a Bluetooth-compatible controller and an R-1 controller (used in earlier custom builds) destroyed motors after a single application of power. Standard IC controller tests had revealed no problems during extended operation or battery exhaustion. Mr. Okada restricted this motor to OK Lab's standard IC controller or its USB rechargeable IC controller.

(Source: ok-lab's diary, published January 2022)
https://ok-lab.hatenablog.com/entry/2022/01/22/123342

Bluetooth controller sales paused after electronics failed during testing

In an entry published in January 2022, Mr. Okada reported an accidental short circuit during a test with the power on. The Bluetooth-compatible controller's IC failed, leaving only steady vibration.

He also said his development interest had shifted toward wearable designs, and he put general sales on hold for a while. For urgent requests, Mr. Okada offered individual replies by email.

(Source: ok-lab's diary, published January 2022)
https://ok-lab.hatenablog.com/entry/2022/01/29/123455

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The maker's answer to IC controller replacement

Mr. Okada offered separate controllers, preferred a specific power source for the smaller motor, and substituted stock after failures.

Separate IC controllers offered flexibility for later chip purchases

In an entry published in December 2019, a customer requested one ceramic medium-length vibrating chip and two detachable controllers. The request paired an ordinary IC controller with a USB rechargeable one. Mr. Okada supported that arrangement despite its higher initial expense.

He said later chip purchases could omit controllers, and separate controllers could help distinguish power problems from other faults. The diary does not record whether this order was delivered. Mr. Okada recommended the arrangement for customers who wanted to try several vibrating chips.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/28/131319

The standard IC controller became Mr. Okada's preferred 6mm option

In an entry published in January 2022, Mr. Okada said continued testing supported accepting 6mm motor orders. He offered them as custom builds, at the same price as 8mm and 10mm versions.

He had found no durability problem in continuous tests with the USB rechargeable controller. However, that pairing produced some heat. Because of that warming, Mr. Okada recommended the standard battery-powered IC controller.

(Source: ok-lab's diary, published January 2022)
https://ok-lab.hatenablog.com/entry/2022/01/29/123455

A 120-mode IC controller replaced units with failed electronics

An entry published in March 2022 reported failed ICs in most controllers from a batch received about 2 months earlier. They produced only steady vibration, regardless of switch settings. Mr. Okada switched to a controller sold by another Japanese manufacturer, offering 120 vibration modes.

He set an interim price of ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04), pending working replacements from China. He planned a later price of ¥3,000, (about $19 at ¥156 = $1, rate as of 2026-09-04) tax excluded, for that controller. Mr. Okada said IC controller buyers would receive this substitute until working stock arrived.

(Source: ok-lab's diary, published March 2022)
https://ok-lab.hatenablog.com/entry/2022/03/12/122940

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How IC controller replacement changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to IC controller replacement

The current list includes the IC upgrade, USB connector option, and base chips used in these requests.

Products that appear in these entries

The IC controller upgrade is listed in the company's own online store.

The USB connector option is listed in the company's own online store.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/28/131319

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

Products the diary mentioned as alternatives

The diary names no alternative.

Historical USB rechargeable versions, the 120-mode controller supplied by OK Lab, Bluetooth custom controller, and custom 6mm or mixed-motor builds:

No matching product can be confirmed on the current list.

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Common worries about IC controller replacement

Reader requests concerned rhythm, mixed motor sizes, and arrangements with two controllers.

"Could an IC controller make vibration more rhythmic?"

In an entry published in February 2019, a reader suggested rhythmically controlled vibration. Mr. Okada said that suggestion prompted him to try IC control with the vibrating chip.

He described subtler changes with glass than resin, which he considered less suited to these patterns. The diary does not record that reader's subsequent experience. Mr. Okada favored glass for experiencing the controller's finer changes.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

"Could an IC controller support different motor sizes?"

In an entry published in February 2019, a customer asked about a twin-motor chip combining 8mm and 10mm motors. They wanted different sizes at opposite ends and asked whether the pairing was technically possible.

Mr. Okada said he had made a sample but had not tested how it felt in use. He also clarified that the earlier 8mm motor shortage was temporary and supplies had resumed. Mr. Okada proposed testing the sample with an IC controller.

(Source: ok-lab's diary, published February 2019)
https://ok-lab.hatenablog.com/entry/2019/02/16/171153

"Could one vibrating chip have two IC controllers?"

In an entry published in February 2020, a customer requested a plain vibrating chip with two controllers. Mr. Okada first described a rechargeable controller plus a basic controller, then suggested two IC controllers for simultaneous operation. The customer chose the new 10mm motor and two rechargeable IC controllers.

Mr. Okada said this motor stopped around 2.8V or below, while previous motors still ran around 1.5V. The diary does not record whether the order was completed. For this motor, Mr. Okada recommended rechargeable controllers because ordinary batteries would need frequent replacement.

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

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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.