Burning when you pee after using a chip? | The diary points to medical assessment [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 "urethritis diagnosis and antibiotics" 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

• The diary records urethritis (urethral inflammation) after chip use, including cases whose cause was not confirmed.
• Mr. Okada describes urine tests and antibiotics (treatment medicines); staff later emphasize following hospital advice.
• The latest included entry, from July 2023, records staff discouraging another attempt with an apparently unsuitable size.

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.

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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: urethritis symptoms and treatment

The OK Prostate Chip is a small device placed in the urethra to act on the prostate. Urinary inflammation is the concern here: the diary describes discomfort, fever and medical visits after chip use. Mr. Okada's accounts discuss urine testing and antibiotics as parts of treatment for symptoms involving the urinary passage. The customer exchanges also cover embarrassment about examinations, uncertainty over causes and questions about returning to use.

Urine tests led to a urethritis diagnosis despite no detected bacteria

In an entry published in November 2017, Mr. Okada describes chills, a 37.2°C fever and a visit to his usual urologist. He says urine testing found increased white blood cells but no bacteria, and the doctor diagnosed urethritis. According to his account, the doctor already knew about his chip use but could not establish whether it caused the inflammation.

His prescribed treatment was 4 days of Cravit, an antibiotic; he reports that his fever disappeared within half a day. A repeat urine test 4 days later led the doctor to declare him recovered. The doctor's advice, as Mr. Okada reports it, was to avoid the chip until recovery was complete.

(Source: ok-lab's diary, published November 2017)
https://ok-lab.hatenablog.com/entry/20171129/1511963864

A later urethritis diagnosis brought another prescription and concern about excessive size

In an entry published in June 2018, Mr. Okada reports another diagnosis of urethritis, this time treated with Flomox instead of Cravit. He initially wondered whether his cleaning habits explained the illness, but the doctor's response changed after seeing a new chip sample. According to Mr. Okada, the doctor considered it too large and thought prolonged contact placed too much strain on the urethra.

The doctor suggested that this might explain the current inflammation; the entry does not establish it as the confirmed cause. The diary does not record how Mr. Okada responded to Flomox. Mr. Okada closes this account with a caution about how suddenly symptoms appeared, reporting that his temperature reached 39.2°C.

(Source: ok-lab's diary, published June 2018)
https://ok-lab.hatenablog.com/entry/20180623/1529741851

Urethritis recovery did not immediately restore comfortable chip use for Mr. Okada

Mr. Okada reports frequent urges to urinate and fever in an entry published in November 2019. By his medical visit, his temperature had returned to normal, though some urinary discomfort remained. He reports being told he was 80% recovered and that roughly 1 more day of antibiotic treatment should complete recovery.

Later in that entry, he says the inflammation appeared resolved, but using a chip still felt uncomfortable and less pleasurable. The diary does not record when that remaining discomfort ended. His stated response was to stop leaving a chip in place for a while.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/02/132358

Fever after chip use led one customer close to hospitalization

An entry published in September 2020 describes acute prostatitis (the customer's reported diagnosis), persistent 39°C fever and test results close to requiring hospitalization. The customer requested a return after several days of clinic visits for antibiotic drips (clinic-administered medicine), intending to stop using chips. They also reported a previous episode of acute prostatitis, so this was a recurrence in their account.

Mr. Okada expressed sympathy but refused a return, citing the company's policy on used products returned for personal reasons. The diary does not record the customer's eventual recovery. Mr. Okada urged early antibiotic treatment and urology assessment when fever occurs, acknowledging that some reported illnesses were severe.

(Source: ok-lab's diary, published September 2020)
https://ok-lab.hatenablog.com/entry/2020/09/12/093836

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The maker's answer to urethritis symptoms and treatment

The replies emphasize medical assessment, while the July 2023 staff response also advises waiting for recovery.

Antibiotics for urethritis were described as a doctor's decision when medical care functions normally

In an entry published in March 2020, Mr. Okada describes seeking antibiotics several times a year after starting chip tests. He says those visits generally ended with recovery within a few days, describing his own experience. In his account, the urologist used urine tests to check bacteria and white blood cells before prescribing antibiotics.

He also recalls episodes of prostatitis before chip testing began, so his history did not start with the product. His discussion included self-directed antibiotic use, prompted by fears that pandemic conditions would disrupt access to medical care. He repeatedly described following a doctor's directions as the right approach when medical services function normally, rather than choosing antibiotics independently.

(Source: ok-lab's diary, published March 2020)
https://ok-lab.hatenablog.com/entry/2020/03/28/144043

Seeing a urologist was Mr. Okada's answer to embarrassment about urinary symptoms

In an entry published in August 2020, a customer asked about bladder-area discomfort after urination and avoiding an embarrassing appointment. Mr. Okada claimed that urinary discomfort could be diagnosed through urine testing alone, without showing the genitals. For cases he considered more complicated, he thought a blood test would usually establish the diagnosis.

He also acknowledged that other suspected conditions could involve a physical examination. The customer's suspected cystitis (bladder inflammation) came from online reading; the entry does not provide a medical diagnosis or follow-up. Mr. Okada's practical recommendation was a urologist visit and urine testing, although his description of examinations was his own expectation.

(Source: ok-lab's diary, published August 2020)
https://ok-lab.hatenablog.com/entry/2020/08/08/130037

Burning when you pee prompted staff to discourage another attempt with an unsuitable size

In an entry published in July 2023, a customer outside Japan reports intense burning at the penis tip after 40 minutes attempting chip use. They reported a hospital diagnosis of urethritis and asked for help; staff initially could not identify the product bought through Amazon's online marketplace. Staff suspected a size mismatch and discouraged further use even after recovery, raising a smaller size only as a conditional possibility.

They also suggested canceling a vibrating-device order placed through the company's own online store. The diary does not record whether that order was canceled or how the customer's symptoms resolved. Staff advised following the hospital's directions and waiting for complete recovery.

(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/08/122632

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.

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How urethritis symptoms and treatment changed over time

The diary does not say what the current state is.

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OK Prostate Chip products related to urethritis symptoms and treatment

No current product is directly tied to this topic.

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Common worries about urethritis symptoms and treatment

The customer questions concerned appointments, recovery time and the cause of burning.

"What was Mr. Okada's experience of seeing a urologist?"

The customer in the August 2020 entry wanted Mr. Okada's personal experience of handling possible urinary inflammation. They were trying to manage symptoms themselves and were already taking a medicine bought without a prescription. He estimated that even an initial appointment would cost no more than ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04), including medicine, in his Japanese setting.

This was his estimate published in August 2020; the entry does not establish present-day fees or charges outside Japan. He also claimed antibiotics would be prescribed for cystitis without explaining its cause; this was his reassurance, not a documented consultation. His advice was to describe the location of discomfort and report any fever, including when it began.

(Source: ok-lab's diary, published August 2020)
https://ok-lab.hatenablog.com/entry/2020/08/08/130037

"How long should rest last before another urine test?"

In an entry published in October 2020, a customer described pain and a blood clot during chip use and asked about rest. A health check 1 week later flagged urine occult blood (blood detected by testing) as +, alongside white blood cells. The customer had used a twisted ceramic chip and a homemade stopper, but reported little obvious blood during later urination.

Mr. Okada said he had neither experienced nor received reports of clots, and could not judge the cause or give a waiting period. He warned that, if infection explained the white blood cells, rest alone might not resolve the problem without antibiotics. Because he also raised the possibility of another illness, Mr. Okada advised seeing a urologist.

(Source: ok-lab's diary, published October 2020)
https://ok-lab.hatenablog.com/entry/2020/10/17/121023

"Does burning when you pee mean tearing or infection?"

In a follow-up published in July 2023, the same overseas customer asked whether a tear or bacteria explained the burning. They described no pain during use and no apparent bleeding, but still wanted to try the device again. Staff thought the rapid onset was difficult to explain by a newly caused tear or infection; they did not establish either cause.

They also suggested that an existing inflammation might have worsened after chip use. The reply acknowledged limited information and a lack of medical expertise, and did not confirm the customer's explanation. Staff therefore advised asking the doctor who had examined the customer.

(Source: ok-lab's diary, published July 2023)
https://ok-lab.hatenablog.com/entry/2023/07/08/122632

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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.