![Can a stiffer cord make insertion easier? | The diary reports benefits and limits [OK Prostate Chip]](/img/a/T0226/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 entries about stiff cord options for easier insertion 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
A firmer cord can resist folding, but the diary records discomfort and compatibility limits.
Mr. Okada advised against prolonged use of the stiff cord and combining it with his silicone-and-aluminum anal chip.
The August 2026 reply accepted 2-wire cable inside tubing but refused a 4-wire version.
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 |
|---|---|
| Stiff cord | A firmer cable behind the chip, intended to transmit force without folding as easily. |
| Vibrating chip | A chip containing a motor, which supplies vibration. |
| Parallel cable | Two joined electrical wires supplying power to a vibrating chip. |
| Silicone tube | A hollow silicone cover used around cable or thread to change the connection's flexibility. |
| Shape-memory wire | Wire that returns toward its original shape, used to support a retaining loop. |
| Retaining loop | A curved cable or wire section intended to help the chip stay positioned. |
| USB connector | A detachable electrical connection used between the chip cable and controller. |
What happens: stiff cord options
The OK Prostate Chip is a small device placed in the urethra (the urine passage) to act on the prostate. A stiff cord is a firmer cable attached behind the chip to transmit force with less folding. On a vibrating chip (a version containing a motor), a parallel cable (two joined electrical wires) also supplies power. Later designs enclosed the connection in a silicone tube (a hollow cover), changing its thickness and flexibility.
A stiff cord modification carried an extra charge in January 2020
In an entry published in January 2020, a customer requested a firmer cable on an elongated ceramic vibrating chip. Mr. Okada quoted ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) for the modification and identified 20cm as the previously illustrated firm-section length. The diary records completion with that length. Mr. Okada also invited the customer to specify a different length if wanted.
(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/11/151714
A wire-supported stiff cord prototype preserved flexibility in March 2022
In an entry published in March 2022, Mr. Okada compared a rigid custom cable with a wire-supported prototype. The prototype contained approximately 0.4mm wire alongside the ordinary parallel cable. He reported easier bending, better retention of a bent shape, and easier advancement than ordinary parallel cable.
These were Mr. Okada's observations from his prototype. He planned further testing with different wire materials.
(Source: ok-lab's diary, published March 2022)
https://ok-lab.hatenablog.com/entry/2022/03/12/122940
A stiff cord order lost its incompatible stopper in April 2022
In an entry published in April 2022, a customer requested a semi-long ceramic vibrating chip with a thicker cable and cable stopper. The 30cm stiff section added ¥1,650 (about $11 at ¥156 = $1, rate as of 2026-09-04). The requested raised-surface chip also changed from M to S because M was unsupported. Mr. Okada explained that the parallel-cable stopper could not fit this cord, and the customer canceled that accessory.
(Source: ok-lab's diary, published April 2022)
https://ok-lab.hatenablog.com/entry/2022/04/02/123050
Breakage reports ended sales of older stiff cord supports by January 2023
In an entry published in January 2023, Mr. Okada explained why the old 4-wire, silicone wire-in-tube, and 6-wire support designs had been discontinued. Customers had reported breakage or signs of possible breakage. His revised approach centered on supplying tube-based components, with responsibility for the wire left to customers. Mr. Okada's stated starting point was that wire could break.
(Source: ok-lab's diary, published January 2023)
https://ok-lab.hatenablog.com/entry/2023/01/07/123115
A double-tube stiff cord alternative received separate prices in June 2024
In an entry published in June 2024, a customer asked whether a three-part wire-linked device could have a pushable connection. Staff initially explained that its 2.5mm tail lacked sufficient stiffness. Mr. Okada then developed a double-tube tail, using 2mm tubing within 4mm tubing.
Published additions were ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) excluding tax for up to 15cm, or ¥4,500 (about $29 at ¥156 = $1, rate as of 2026-09-04) excluding tax for up to 25cm. Mr. Okada reported improved support but cautioned that passage could still be difficult in a dry urethra.
(Source: ok-lab's diary, published June 2024)
https://ok-lab.hatenablog.com/entry/2024/06/01/123036
A doubled stiff cord design added separate charges in September 2024
In an entry published in September 2024, Mr. Okada presented doubled parallel cable intended to improve strength and positioning. Extras were ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) for cable, ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) for nylon thread, and ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) for up to 10cm of joined cable. Each additional 5cm cost ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04); these prices excluded tax.
Joined length was limited to 20cm, with 35cm overall to the USB connector (a detachable electrical connection). The former 70cm arrangement could not be made in this design. Mr. Okada suggested an external extension cable for the shorter reach.
(Source: ok-lab's diary, published September 2024)
https://ok-lab.hatenablog.com/entry/2024/09/07/123204
A springy stiff cord loop caused pain during February 2025 testing
In an entry published in February 2025, Mr. Okada tested shape-memory wire (wire that returns toward its original shape) alongside cable. It supported a retaining loop (a curved section intended to help the chip stay positioned). The retaining section measured 70mm or more.
He reported pain when it shifted into the urethra within the penis, where the wire's tension spread the passage. Mr. Okada cautioned that the expanding loop was unsuitable for prolonged placement there.
(Source: ok-lab's diary, published February 2025)
https://ok-lab.hatenablog.com/entry/2025/02/01/122912
The maker's answer to stiff cord options
Mr. Okada repeatedly separated easier advancement from comfort, compatibility, and suitability for prolonged use.
A stiff cord could resist folding but increase strain in February 2020
In an entry published in February 2020, a customer struggled to advance a 38mm semi-long vibrating chip. Mr. Okada identified cable friction and folding as possible obstacles. He described a 20cm stiff section as an option when folding persisted.
The diary does not record whether the customer tried that option. Mr. Okada expected greater strain on the urethra and advised against prolonged placement with the stiff cable.
(Source: ok-lab's diary, published February 2020)
https://ok-lab.hatenablog.com/entry/2020/02/01/151232
A stiff cord received explicit limits after an October 2022 bleeding report
In an entry published in October 2022, a customer found stiff cable easier to advance but less effective at maintaining position than earlier wire supports. The customer reported heavy bleeding after combining the device with an anal device, then requested OK Lab's silicone-and-aluminum anal chip.
Mr. Okada said he had judged the cord while making it, without personally using it. He considered it suitable for brief, simple use and discouraged prolonged use or combining it with that anal chip.
(Source: ok-lab's diary, published October 2022)
https://ok-lab.hatenablog.com/entry/2022/10/08/122859
A stiff cord accessory request required tube replacement in November 2022
In an entry published in November 2022, a customer wanted another small screw-shaped stopper added to a delivered short ceramic chip's silicone-and-nylon tube. The customer liked the connection but reported unwanted inward movement. Mr. Okada refused additional work on delivered products, specifically including used tubing, which he thought would be difficult to bond.
The diary does not record whether a replacement was ordered. His offered solution was replacement of the tube itself, incorporating the requested extra component.
(Source: ok-lab's diary, published November 2022)
https://ok-lab.hatenablog.com/entry/2022/11/26/122622
A tube-covered stiff cord brought different limits in October 2023
In an entry published in October 2023, Mr. Okada introduced a jointless 2-wire cable inside 4mm silicone tubing. Enclosure added ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) excluding tax. The covered section had a 25cm maximum, with overall length limited to 40cm.
The default was 25cm covered plus 15cm ordinary cable. He reported easier passage with moisture present on both the tube and urethral lining. Mr. Okada cautioned that silicone could stick against dry lining and prevent movement altogether.
(Source: ok-lab's diary, published October 2023)
https://ok-lab.hatenablog.com/entry/2023/10/14/122718
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 stiff cord options changed over time
| Published | What the diary said then |
|---|---|
| Mar 2019 | Thicker copper supported a newly adopted silicone-covered cable. |
| Jul 2019 | Mr. Okada reported S-shaped cable folding that hindered advancement. |
| Oct 2019 | Standard 1.2mm parallel wires contrasted with proposed 1.6mm and 3mm alternatives. |
| Nov 2019 | Customer feedback favored a longer firm section after a successful custom trial. |
| Feb 2022 | Stiff cord used drone-wiring material; Mr. Okada disliked its limited flexibility. |
| Sep 2022 | A 15cm firm section followed by 20cm ordinary cable was quoted at ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04). |
| Aug 2023 | Staff warned stiff cable could enlarge electrode chips and worsen insertion difficulty. |
| Feb 2024 | A flexible reinforced tail was prototyped; release awaited further refinement. |
| Mar 2025 | A customer reported easier insertion but less chip movement with silicone-covered twisted cable. |
| Feb 2026 | Mr. Okada prototyped a 1mm tube inside 2mm tubing, expecting greater firmness. |
OK Prostate Chip products related to stiff cord options
Current listings include the base chips and cable stopper below; they do not confirm the historical custom configurations.
Products that appear in these entries
| Product (official name) | Price incl. tax | Relation to this topic |
|---|---|---|
| Elongated ceramic vibrating chip (OKプロステート核振チップ 陶器素材覚醒タイプ) | ¥7,700 (about $49 at ¥156 = $1, rate as of 2026-09-04) | Used for the January 2020 custom order with a firmer cable. |
| Semi-long ceramic vibrating chip (OKプロステート核振チップ 陶器素材セミロングタイプ) | ¥6,600 (about $42 at ¥156 = $1, rate as of 2026-09-04) | Used in the April 2022 order whose stiff cable could not accommodate the requested stopper. |
| Parallel-cable stopper option (平行ケーブル用ストッパー追加（オプション）) | ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) | Canceled from the April 2022 order because it could not fit that stiff cable. |
| Short ceramic vibrating chip (OKプロステート核振チップ 陶器素材ショートタイプ) | ¥5,500 (about $35 at ¥156 = $1, rate as of 2026-09-04) | Requested as the base for the April 2025 wire-loop prototype described below. |
(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
(Source: ok-lab's diary, published April 2025)
https://ok-lab.hatenablog.com/entry/2025/04/26/122909
Products the diary mentioned as alternatives
The diary names no alternative.
Custom cord builds, double-tube tails, and wire-loop prototypes: No matching product can be confirmed on the current list.
Common worries about stiff cord options
Cost, controller separation, and wire compatibility depended on the specific build.
"How much did the stiff cord modification cost?"
In an entry published in February 2022, a customer asked about pricing and whether the controller detached. Published pricing was ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) excluding tax per 10cm, or ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) excluding tax for 20cm.
Ordinary cable continued after the firm section, and the controller remained attached. Mr. Okada said a separate USB connection option was required for a detachable controller. He generally discouraged the stiff cord because its inflexibility made handling awkward.
(Source: ok-lab's diary, published February 2022)
https://ok-lab.hatenablog.com/entry/2022/02/26/123231
"Can a stiff cord connect to shape-memory wire?"
In an entry published in April 2025, a customer requested easier positioning with a short ceramic vibrating chip and shape-memory wire. Staff initially said the pairing was difficult; Mr. Okada considered attaching the wire alongside other materials generally impractical. His successful approaches were tubing enclosure or containing a single wire loop within a cable loop.
He then built a prototype whose electrical cable and retaining loop connected only at the loop's ends. The short ceramic build cost ¥11,000 (about $70 at ¥156 = $1, rate as of 2026-09-04) excluding tax, with a 20cm silicone tube adding ¥2,000 (about $13 at ¥156 = $1, rate as of 2026-09-04) excluding tax. Mr. Okada cautioned that this design required a longer rear connection, with approximately 15mm of resin behind the motor.
(Source: ok-lab's diary, published April 2025)
https://ok-lab.hatenablog.com/entry/2025/04/26/122909
"Which stiff cord configuration was accepted most recently?"
In an entry published in August 2026, a customer requested a tube-covered cable and an end stopper. OK Lab replied that 2-wire parallel cable was standard inside the silicone tube. A 4-wire version was refused because it required a larger tube.
Connecting the requested stopper at the tube's end was untested. The diary does not record whether this order was completed. Mr. Okada suggested a larger resin ball as a possible alternative for limiting excessive inward travel.
(Source: ok-lab's diary, published August 2026)
https://ok-lab.hatenablog.com/entry/2026/08/29/122931
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? | Firmer connections can resist folding, with discomfort and compatibility tradeoffs. |
| What is the product? | A urethral device made and sold by OK Lab in Japan. |
| What do the connection terms mean? | They distinguish electrical cable, tube covers, and supports intended to maintain position. |
| What happened in the diary? | Custom cables developed into wire-supported, doubled, and tube-covered designs. |
| What did the maker advise? | He discouraged prolonged stiff-cord use and certain combinations. |
| What changed over time? | Materials, flexibility, dimensions, prices, and accepted configurations changed. |
| What can current listings confirm? | The listed base chips and stopper, without confirming historical custom builds. |
| What did customers ask? | About modification costs, detachable controllers, wire compatibility, and stopper connections. |
| How do overseas purchases work? | Advance PayPal payment, a 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.