![How much do metal prostate chips cost? | Listed models cost ¥3,300 or ¥9,900 incl. tax [OK Prostate Chip]](/img/a/T0290/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 the entries about "metal chip prices: titanium, stainless steel, and rings" 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
- Metal chip prices varied with material, length, and custom connection work.
- Mr. Okada’s quotes separated chip bodies from connection work and optional parts.
- The current list includes a ring chip and two other stainless steel models.
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 |
|---|---|
| Stainless steel ring chip | A chip combining steel rings and resin supports, intended to act on the prostate. |
| Resin | A molded material used to secure ring components or form other chip bodies. |
| Auxiliary chip | An additional small chip intended to help support an assembly’s position. |
| Stopper | An additional component intended to limit unwanted movement, including movement toward the bladder. |
| Retrieval thread | A line attached to a chip for retrieval; some designs also use thread between components. |
| Internal connection | Cord and resin positioned inside the rings to support them while leaving the outer metal exposed. |
| Bent connection | A curved junction joining chips; the diary’s custom examples included separate charges for this work. |
What happens: metal prostate chip prices
The OK Prostate Chip is a small device placed in the urethra (the urine passage) to act on the prostate. The titanium and stainless steel versions are metal forms of that device, intended for the same location. The ring version combines steel rings with resin (molded support material) around its ends. Prices also reflect connections between chips and optional parts intended to help hold an assembly in place.
Stainless steel ring chips were announced at ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) before tax
In an entry published in December 2020, Mr. Okada announced the short stainless steel ring chip at ¥3,000, (about $19 at ¥156 = $1, rate as of 2026-09-04) tax excluded. He said sales were planned for the following week. That price matched the ceramic and glass short chips discussed in the entry.
Mr. Okada expressed concern about a ring chip moving into the bladder. He recommended a stopper or screw-shaped auxiliary chip, additional parts intended to limit that movement.
(Source: ok-lab's diary, published December 2020)
https://ok-lab.hatenablog.com/entry/2020/12/19/132929
A linked stainless steel ring chip quote charged for each component
In an entry published in January 2021, Mr. Okada priced a prototype combining two ring chips and a screw-shaped auxiliary chip. Each ring chip cost ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04), and the auxiliary chip also cost ¥3,000, (about $19 at ¥156 = $1, rate as of 2026-09-04) all tax excluded. Cord attachment cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) for each ring chip.
Each bent connection (a curved junction between chips) cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04), and the electrical connector plug cost another ¥1,000, (about $6 at ¥156 = $1, rate as of 2026-09-04) tax excluded. These were separate items in an estimate, with no single package price stated. For an order without electrical features, Mr. Okada offered a free resin end piece instead of the plug.
(Source: ok-lab's diary, published January 2021)
https://ok-lab.hatenablog.com/entry/2021/01/02/123619
Flexible stainless steel ring chips added wiring and coating charges
In an entry published in March 2021, Mr. Okada abandoned the stretching-spring approach in favor of linked short chips. He described units around 10–20 mm long, with flexibility provided by their connections. His three-chip example listed ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) × 3 for the chips and ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) × 3 for embedded cords, tax excluded.
Plain rubber coating cost ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04), while specially bent connections cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) each, tax excluded. He offered individual chip lengths up to 39 mm. The diary did not yet record a completed test of how easily this assembly could be removed.
(Source: ok-lab's diary, published March 2021)
https://ok-lab.hatenablog.com/entry/2021/03/13/130202
Longer stainless steel ring chips entered a higher price band
In an entry published in May 2021, a large custom assembly revealed different prices for longer ring chips. Rings up to 39 mm cost ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) each, tax excluded. Rings measuring 40 mm or longer cost ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) each, tax excluded.
Mr. Okada reported checking the completed components together before shipment. The diary does not record how that customer’s assembly felt in use.
(Source: ok-lab's diary, published May 2021)
https://ok-lab.hatenablog.com/entry/2021/05/22/125847
Titanium chip prices began as estimates with thread attachment charged separately
In an entry published in July 2021, Mr. Okada published initial planned titanium prices. The short titanium body was ¥8,000 (about $51 at ¥156 = $1, rate as of 2026-09-04), plus ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) for attaching the retrieval thread, the line used for retrieval. Both figures excluded tax.
The titanium screw-shaped auxiliary chip was ¥7,000, (about $45 at ¥156 = $1, rate as of 2026-09-04) and the titanium 8-hole stopper was ¥5,000, (about $32 at ¥156 = $1, rate as of 2026-09-04) tax excluded. Mr. Okada explained that outsourced production required supplier prices and a margin for OK Lab. He presented these figures as planned prices.
(Source: ok-lab's diary, published July 2021)
https://ok-lab.hatenablog.com/entry/2021/07/10/125840
Rough thread holes made the titanium chip prices uncertain
In an entry published in July 2021, Mr. Okada reported poorly formed thread holes in some titanium prototypes. The supplier initially said changing production methods would double its price. Mr. Okada requested properly made parts even at that cost, but the revised quotation was not double.
He warned that the titanium selling prices announced the previous week might change.
(Source: ok-lab's diary, published July 2021)
https://ok-lab.hatenablog.com/entry/2021/07/17/125832
A stainless steel chip trial ended after its limited release
In an entry published in August 2022, Mr. Okada offered 14 medium semi-long stainless steel chips in a limited trial sale. The provisional price was ¥9,000, (about $58 at ¥156 = $1, rate as of 2026-09-04) tax excluded, because detailed manufacturing costs were still unsettled. An added note records that this trial sale ended on August 23.
The entry did not give a firm date for general sales. Mr. Okada invited inquiries by email while the trial stock remained available.
(Source: ok-lab's diary, published August 2022)
https://ok-lab.hatenablog.com/entry/2022/08/20/122920
Stainless steel chip prices accompanied a launch with temporary sales limits
In an entry published in July 2023, Mr. Okada announced stainless steel sales with temporary limits because some chips remained difficult to thread. Prices excluded tax: screw-shaped and flat auxiliary chips were ¥5,000 (about $32 at ¥156 = $1, rate as of 2026-09-04) each, short chips ¥7,000, (about $45 at ¥156 = $1, rate as of 2026-09-04) and semi-long chips ¥9,000 (about $58 at ¥156 = $1, rate as of 2026-09-04).
The flat-curved semi-long chip cost ¥10,000 (about $64 at ¥156 = $1, rate as of 2026-09-04), while the stainless steel model called Kyōaku Zoro cost ¥9,000 (about $58 at ¥156 = $1, rate as of 2026-09-04). The long Zoro and standard long models each cost ¥13,500 (about $86 at ¥156 = $1, rate as of 2026-09-04); the model called Awakening cost ¥14,500 (about $93 at ¥156 = $1, rate as of 2026-09-04).
Mr. Okada could not yet distinguish difficulties caused by technique from difficult holes or faulty parts. He advised reservations by email so OK Lab could check assembly before accepting payment.
(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/08/122632
The maker's answer to metal prostate chip prices
The diary connects metal chip prices to production work, connection design, and the options needed to complete an order.
Simpler stainless steel ring chips aimed to reduce production costs
In an entry published in December 2020, Mr. Okada explained that shaping rings entirely by hand made production unusually demanding. His initial costing could not support prices comparable to existing resin, ceramic, or glass chips. He therefore tested a simpler production method that might approach ceramic and glass prices.
He warned that a 45-degree bent connection would remain expensive because it required substantial work. His stated aim was to make the standalone ring chip more affordable.
(Source: ok-lab's diary, published December 2020)
https://ok-lab.hatenablog.com/entry/2020/12/12/124126
Internal connections made stainless steel ring chips cost more per unit
In an entry published in March 2021, a customer asked whether support could move inside the rings, leaving the outer metal exposed. Mr. Okada rejected several thin inner cords because he doubted their strength. Instead, he produced an internal connection, with one cord supported by thicker resin inside the rings.
The additional difficulty and labor added ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) per chip, tax excluded. Mr. Okada proposed linked short chips because he still considered the spring itself unsuitable for bending.
(Source: ok-lab's diary, published March 2021)
https://ok-lab.hatenablog.com/entry/2021/03/13/130202
Stainless steel chip orders needed discussion before options were settled
In an entry published in July 2023, Mr. Okada explained that custom requests often required discussion before an order could be finalized. The revised process acknowledged both the reservation and completion by email. Website notices would cover major delays and products that had run out.
The reservation instructions listed a four-thread option at +¥2,750 (about $18 at ¥156 = $1, rate as of 2026-09-04), and either stainless steel auxiliary shape at +¥5,500 (about $35 at ¥156 = $1, rate as of 2026-09-04). Mr. Okada requested payment after completion, except when a custom order required advance payment because cancellation would leave an unusable item.
(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/15/123004
How metal prostate chip prices changed over time
| Published | What the diary said then |
|---|---|
| Dec 2020 | Standard ring length was just under 30 mm; custom lengths reached 39 mm. |
| Mar 2021 | External cord connections added about 0.7 mm of resin thickness. |
| Mar 2021 | Internal connections required ring outer diameters of at least 5.6 mm. |
| Mar 2021 | A newer connection required rubber coating at ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) per section, tax excluded. |
| Jun 2021 | Titanium retail pricing remained undecided because costing was unfinished. |
| Jul 2021 | Twisted titanium shapes were priced above flat shapes of equal volume. |
| Jul 2023 | Thread replacement cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) per chip, tax excluded. |
| Jul 2023 | Four-thread orders gained compatible 12-hole stoppers. |
| May 2025 | Mr. Okada reported little ring testing because he found its stimulation too strong. |
OK Prostate Chip products related to metal prostate chip prices
The current list prices the short ring chip at ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04) and the listed semi-long and Zoro stainless steel models at ¥9,900 (about $63 at ¥156 = $1, rate as of 2026-09-04).
Products that appear in these entries
| Product (official name) | Price incl. tax | Relation to this topic |
|---|---|---|
| Short stainless steel ring chip (OKプロステートチップ ステンレスリング ショートタイプ) | ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04) | The December 2020 entry announced the short ring chip and its planned launch price. |
| Semi-long stainless steel chip (OKプロステートチップ セミロングタイプ（サージカルステンレス）) | ¥9,900 (about $63 at ¥156 = $1, rate as of 2026-09-04) | The July 2023 sales announcement included the semi-long model in its price schedule. |
| Stainless steel Zoro model (OKプロステートチップ 凶悪ゾロ（サージカルステンレス）) | ¥9,900 (about $63 at ¥156 = $1, rate as of 2026-09-04) | The July 2023 announcement priced this model during the restricted initial sales period. |
(Source: ok-lab's diary, published December 2020)
https://ok-lab.hatenablog.com/entry/2020/12/19/132929
(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/08/122632
Products the diary mentioned as alternatives
| Product (official name) | Price incl. tax | Relation to this topic |
|---|---|---|
| Resin screw-shaped auxiliary chip (スクリュー型補助チップ追加オプション（生体適合樹脂）) | ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04) | In September 2021, Mr. Okada proposed linked resin screw-shaped auxiliary chips while titanium remained unavailable. |
(Source: ok-lab's diary, published September 2021)
https://ok-lab.hatenablog.com/entry/2021/09/25/125720
| Historical item | Status |
|---|---|
| Titanium prototypes; custom linked or longer ring builds | No matching product can be confirmed on the current list. |
| Other July 2023 stainless steel models: short, flat-curved semi-long, standard long, long Zoro, Awakening, and auxiliary chips | No matching product can be confirmed on the current list. |
| Limited medium semi-long trial batch | The August 2022 entry records the trial sale ending on August 23. |
Common worries about metal prostate chip prices
Reader questions concerned titanium availability, expected cost, and an unexplained problem with a purchased ring chip.
"Will titanium chips be available after ceramic breakages?"
In an entry published in July 2021, a customer asked about titanium after reporting two ceramic chip breakages. Mr. Okada confirmed plans for titanium products, but said their cost could make extensive stockholding difficult. He expected trial orders to begin during July 2021.
The diary does not record whether this customer later received a titanium chip. Mr. Okada said large or unusual shapes might require manufacture after ordering, while some popular designs could be stocked.
(Source: ok-lab's diary, published July 2021)
https://ok-lab.hatenablog.com/entry/2021/07/03/125851
"How much would titanium chips cost compared with resin?"
In an entry published in September 2021, a beginner requested a short titanium chip, an estimated price, and information about availability. Mr. Okada said titanium sales would begin no earlier than around the end of 2021. He expected titanium to cost more than twice as much as resin.
The diary does not record what this customer eventually bought. Mr. Okada suggested resin in the meantime and proposed a linked arrangement of screw-shaped auxiliary chips.
(Source: ok-lab's diary, published September 2021)
https://ok-lab.hatenablog.com/entry/2021/09/25/125720
"Is black residue on a stainless steel ring chip harmless?"
In an entry published in May 2025, a customer asked about black, oil-like residue from a stainless steel ring chip. OK Lab’s staff said this was the first report and that the cause and the purchased coil’s detailed composition were unknown. They offered a refund if the residue persisted after cleaning or the customer remained uneasy.
The customer replied that they intended to continue using it, based on their own online reading. The diary does not record a confirmed explanation for the residue. Mr. Okada requested reports of problems and said he would consider stopping sales if a problem was identified.
(Source: ok-lab's diary, published May 2025)
https://ok-lab.hatenablog.com/entry/2025/05/31/122940
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? | Material, length, and connection work affected historical metal chip prices. |
| What is this product? | A urethral device made and sold by OK Lab in Japan. |
| What do the component names mean? | Rings form a chip; threads, connections, auxiliary chips, and stoppers have separate roles. |
| Why did quoted prices differ? | Some quotations covered bodies alone; others included multiple chips and custom work. |
| How did the maker address costs? | Mr. Okada simplified production and itemized additional work. |
| What changed over time? | Construction, planned titanium pricing, sales arrangements, and reported problems developed across the dated entries. |
| What prices are listed today? | The ring chip is ¥3,300 (about $21 at ¥156 = $1, rate as of 2026-09-04); the listed semi-long and Zoro stainless steel models are ¥9,900, (about $63 at ¥156 = $1, rate as of 2026-09-04) including tax. |
| What remained uncertain? | Titanium delivery and the cause of the reported black ring residue were not established for those customers. |
| How are overseas purchases paid for? | Advance PayPal payment, plus the handling fee and EMS shipping, under the stated terms. |
| What distinguishes the prices throughout this summary? | Diary quotations describe their publication period; the product table uses the September 2026 list. |
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.