![Can the control belt serve as a pulling cord? | The maker described several applications [OK Prostate Chip]](/img/a/T0263/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. He founded OK Lab, a small company in Japan (Okada Comfortable Life Laboratory). Only the entries about using the control belt as a pulling cord 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 diary describes the control belt as an elastic pulling cord for several accessories.
Mr. Okada proposed stretchy material and described the belt as controlling pressure.
The current product list includes the control belt at ¥550 (about $4 at ¥156 = $1, rate as of 2026-09-04) including tax.
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 |
|---|---|
| Control belt | A stretchy fabric cord. Mr. Okada describes it as providing adjustable pulling force for anal chips and frame accessories. |
| Pulling cord | A cord that applies force to a device. The April 2020 entry discusses it as a source of backward pull. |
| Anal chip | A device used through the anus. Mr. Okada describes it as applying pressure toward the prostate. |
| External frame | A shaped support positioned around the base of the penis. Mr. Okada describes it as a device for applying pressure. |
| Tension | Pulling force in the belt. Mr. Okada says it governs the pressure applied by the attached anal chip. |
| Leverage | The turning effect of force on a supported part. Mr. Okada uses it to explain pressure from the dinosaur-shaped attachment. |
| Support cord | A cord included in some October 2022 anal-chip requests. Its precise function in those configurations: The diary does not explain this. |
What happens: using a control belt as a pulling cord
The OK Prostate Chip is a device placed in the urethra (urine passage) to act on the prostate. The control belt is a stretchy cord for an anal chip, a separate device used through the anus. The diary places the belt across the shoulder and back, outside the body. Mr. Okada described it as controlling pressure and later suggested the same accessory as a pulling cord for frame devices.
The control belt linked pulling force with pressure in October 2018
In an entry published in October 2018, the control belt cost ¥500, (about $3 at ¥156 = $1, rate as of 2026-09-04) tax excluded. Mr. Okada described tension (pulling force) as the feature governing pressure from the anal chip.
According to his explanation, stronger backward tension produced stronger stimulation of the prostate. His proposal was a belt whose tension allowed that pressure to vary.
(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181031/1540960147
The control belt gained an external frame application in April 2020
In an entry published in April 2020, Mr. Okada presented a revised external frame (a shaped support around the penis base). He said the previous design's stocking cover made washing and handling inconvenient. The revision used a stainless-steel frame with white resin accents and emphasized easier handling.
Mr. Okada reported that the frame could produce an effect without either a motor or a rear pulling cord. He described elastic support as allowing longer, repeated orgasms without ejaculation. For that supporting role, he specifically named the company's control belt as an option.
(Source: ok-lab's diary, published April 2020)
https://ok-lab.hatenablog.com/entry/2020/04/18/133904
Mr. Okada described control belt pressure through leverage in May 2020
In an entry published in May 2020, Mr. Okada described a dinosaur-shaped frame with an anal attachment. He attributed pressure from its head-shaped part to leverage (the turning effect created by the belt's backward pull). He also said support around the penis kept the attachment's angle from shifting.
The attachment was approximately 8 mm thick, and the design cost ¥10,000, (about $64 at ¥156 = $1, rate as of 2026-09-04) tax excluded, as published that month. Mr. Okada reported sufficient effect without operating the motor. His proposed source of mechanical force was the control belt or a similar pulling cord.
(Source: ok-lab's diary, published May 2020)
https://ok-lab.hatenablog.com/entry/2020/05/02/131505
An anal chip support cord featured in October 2022’s ¥7,700 (about $49 at ¥156 = $1, rate as of 2026-09-04) quote
In an entry published in October 2022, a customer requested a newer anal chip in size M, including a support cord. The diary gave a price of ¥7,700 (about $49 at ¥156 = $1, rate as of 2026-09-04) for that request.
The diary does not record whether this support cord was the separately sold control belt. It also does not record whether the customer received the item or how it felt in use.
(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/15/123011
The maker's answer to using a control belt as a pulling cord
Mr. Okada described stretchy material, an intentionally long belt, and a separate purchase for the frame accessory.
Stretch was the maker’s stated requirement for control belt alternatives
The October 2018 entry described a belt made from connected loops of stocking fabric. This was the material behind the elastic cord discussed in that entry.
The diary does not record comparative tests of different cord materials. Mr. Okada's stated answer about alternatives was that any stretchy cord could serve the role.
(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181031/1540960147
The control belt’s supplied length was intended for individual adjustment
In the entry published in October 2018, the control belt was supplied deliberately long. The diary does not record a standard finished length or a measured range of extension. Mr. Okada described the extra length as intended for shortening to suit the purchaser.
(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181031/1540960147
The control belt was sold separately from April 2020’s frame
The April 2020 entry priced the basic second frame at ¥5,000, (about $32 at ¥156 = $1, rate as of 2026-09-04) tax excluded. That price excluded the pulling cord and stocking cover.
A motor was included, while its controller was sold separately. Mr. Okada likewise listed the control belt as a separate purchase and suggested it as an elastic pulling cord for the frame.
(Source: ok-lab's diary, published April 2020)
https://ok-lab.hatenablog.com/entry/2020/04/18/133904
How using a control belt as a pulling cord changed over time
| Published | What the diary said then |
|---|---|
| Oct 2018 | The belt cost ¥500, (about $3 at ¥156 = $1, rate as of 2026-09-04) tax excluded; Mr. Okada described variable pressure through tension. |
| Apr 2020 | The revised frame could use the belt, purchased separately, as its pulling cord. |
| May 2020 | Mr. Okada reported belt-driven pressure from the dinosaur-shaped attachment without motor operation. |
| Aug 2020 | A customer reported that the fabric cord resolved repeated anal-toy slippage. |
| Oct 2022 | Separate requests priced a cord-equipped M chip and cord-free L chip differently. |
The diary does not say what the current state is.
OK Prostate Chip products related to using a control belt as a pulling cord
The control belt remains on the supplied current product list at ¥550 (about $4 at ¥156 = $1, rate as of 2026-09-04) including tax.
Products that appear in these entries
| Product (official name) | Price incl. tax | Relation to this topic |
|---|---|---|
| Anal-chip control belt (お尻チップ用コントロールベルト) | ¥550 (about $4 at ¥156 = $1, rate as of 2026-09-04) | In October 2018, Mr. Okada described this belt as an elastic accessory for controlling pressure from an anal chip. |
The control belt is listed in OK Lab's own online store.
(Source: ok-lab's diary, published October 2018)
https://ok-lab.hatenablog.com/entry/20181031/1540960147
Products the diary mentioned as alternatives
The diary names no alternative.
For the historical frame designs and newer custom anal-chip configurations described above:
No matching product can be confirmed on the current list.
Common worries about using a control belt as a pulling cord
The reader messages concern a slipping toy, a request without a support cord, and uncertainty about anal-chip sizes.
"Can a control belt help with a slipping anal toy?"
In an entry published in August 2020, a customer described an anal toy that repeatedly slipped out. The customer wanted it to stay in place and reported that the supplied fabric cord had resolved the problem. The object was a rod-shaped item from a low-cost variety shop.
The customer knew the accessory as a cord made from tied tights, supplied through a promotion. Mr. Okada replied that its product name was the control belt. The diary does not record further testing or later follow-up about that toy.
(Source: ok-lab's diary, published August 2020)
https://ok-lab.hatenablog.com/entry/2020/08/29/130333
"Was an anal chip available without its support cord?"
An entry published in October 2022 records a request for a newer anal chip in size L (90 mm) without a support cord. Mr. Okada quoted ¥6,600 (about $42 at ¥156 = $1, rate as of 2026-09-04) for the version without the cord. The diary does not record whether this order was completed.
(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/15/123011
"Which anal chip sizes were offered with a support cord?"
A separate request published in October 2022 concerned a silicone-and-aluminum anal chip with a support cord. The customer said approximately 35 mm seemed acceptable and asked what other sizes were available.
Mr. Okada directed the customer to a size table in the diary. The customer subsequently specified M, and the recorded price was ¥7,700 (about $49 at ¥156 = $1, rate as of 2026-09-04). The diary does not record how that size felt in use.
(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/15/123011
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 described the control belt as an elastic pulling accessory, including for external frame designs. |
| What is the base product? | The OK Prostate Chip is a urethral device made and sold by OK Lab in Japan. |
| What do the accessory terms mean? | The control belt supplies elastic pulling force; the later support-cord requests do not fully explain their cord configurations. |
| What happened in the development entries? | The diary described pressure control in October 2018, frame applications in April and May 2020, and cord-equipped custom requests in October 2022. |
| What did the maker propose? | Stretchy cord material, an intentionally long belt, and a separately purchased belt for the April 2020 frame. |
| What changed over time? | The recorded applications expanded from anal-chip pressure control to frame support and a customer's report about toy slippage. |
| What is listed currently? | The anal-chip control belt is ¥550 (about $4 at ¥156 = $1, rate as of 2026-09-04) including tax on the supplied current product list. |
| What did customers ask or report? | One reported resolved slippage; separate customers requested a cord-free chip and clarification of sizes for a cord-equipped version. |
| How do overseas orders work? | Payment is in advance through PayPal, with a ¥400 (about $3 at ¥156 = $1, rate as of 2026-09-04) handling fee and additional Japan Post 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.