KARADA内科クリニック

What KARADA内科クリニック does

KARADA内科クリニック (KARADA Internal Medicine Clinic) is a private medical corporation (医療法人社団OURS) headquartered in Gotanda, Tokyo, that operates a nationwide Japanese online telemedicine service branded JUST IN CASE. Its core function is the prescription and direct-to-consumer delivery of medications for sexually transmitted infection (STI) prevention: HIV PrEP (Tafero EM, daily or on-demand), HIV PEP (Taffic, a 30-day post-exposure course), and DOXY PEP (doxycycline, for syphilis, gonorrhea, and chlamydia post-exposure prophylaxis), supported by optional at-home STI test kits. Consultations are conducted entirely through LINE (no dedicated app required) with physicians credentialed in infectious disease, and medications are shipped discreetly via Yamato Transport with home delivery or locker pickup.

The underlying technology is a web + LINE-based synchronous telemedicine workflow integrated with mail-order pharmacy fulfillment and shipping logistics. Pricing is unit-based for single courses and subscription-based for ongoing PrEP (28–80 day cycles) and DOXY-PEP (28-day regular delivery). Patients also pay separately for optional postal STI tests. The only disclosed integration is the LINE Official Account used as the primary booking and consultation surface.

The business model is a direct-to-consumer specialist clinic monetizing prescription consultations and medication fulfillment, with subscriptions on PrEP and DOXY-PEP providing recurring revenue and PEP functioning as a high-ticket one-off. The customer base is horizontal: individual Japanese adults with elevated HIV/STI risk who are seeking discreet, rapid access to prevention medications and testing. The affiliated physical KARADA内科クリニック 五反田 clinic serves as a referral point for in-person consultations. Since launch, JUST IN CASE has expanded its scope to include additional "delicate" categories such as 肥満症 (obesity), ED, and AGA.

Name

KARADA内科クリニック

Legal name

、医療法人社団OURS

Website

https://just-in-case.jp

Company type

Private

Operating status

Operating

Short description

JUST IN CASE is a Japan-wide online telemedicine clinic operated by KARADA内科クリニック that prescribes and delivers HIV PrEP, HIV PEP, DOXY PEP, and at-home STI tests via LINE-based consultations and Yamato shipping for individual Japanese consumers.

Ownership category

akta.pro rank

Product category

Online Telemedicine Healthcare Services

NAICS

Offices of Physicians (except Mental Health Specialists) (621111), Other Ambulatory Health Care Services (6219)

SIC

Services-Offices & Clinics Of Doctors Of Medicine (8011)

akta.pro primary industry

Infectious Disease & STI Testing-to-Treatment with eRx + Pharmacy Fulfillment (HLALAIAL)

akta.pro secondary industries

DTC Telehealth with Integrated Online Pharmacy (Cash-Pay/Subscription) (HLALAIAA), Prescription-Based Digital Clinics (Condition-Specific Rx Programs) (HLALAAAD)

Keywords

• Online telemedicine services
• STI prevention medication
• HIV pre-exposure prophylaxis
• Sexual health consultations
• Mail-order prescription services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Supply Chain, Infrastructure

Revenue model

1. HIV PEP prescription and medication sales: One-time prescription sale of HIV post-exposure prophylaxis (PEP) medication (Taffic), including 30-day supply of antiretrovirals, physician consultation, and an at-home HIV/hepatitis B test kit. Additional optional follow-up consultation available.
2. HIV PrEP prescription and medication sales: Prescription and sale of HIV pre-exposure prophylaxis (PrEP) medication (Tafero EM / generic), available as daily or on-demand dosing. Sold as one-time purchase, or via subscription with scheduled refills (28–80 day cycles). Includes at-home test kit sets (start, minimum, standard) for HIV/hepatitis B/syphilis screening. 6-month prescriptions require prior Tafero EM use history.
3. DOXY PEP prescription and medication sales: Prescription and sale of doxycycline post-exposure prophylaxis (DOXY PEP) — an antibiotic regimen for prevention of syphilis, gonorrhea, and chlamydia after sexual contact. Sold in packs of 1, 5, 10, 20, or 30 doses, with optional subscription (regular delivery every 28 days) and optional add-ons (probiotics, anti-nausea medication). Regular at-home testing strongly recommended and required for continued purchase.
4. Optional postal STI testing: Mailed self-collection STI test kits sold as add-ons to prescription services: HIV/hepatitis B (home test, immediate results), syphilis, gonorrhea/chlamydia (mailed to clinic, results in 3–4 days after receipt).

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

KARADA内科クリニック runs the JUST IN CASE online telemedicine service that provides remote physician consultations and prescriptions for STI prevention medications, including HIV PrEP (Tafero EM), HIV PEP (Taffic), and DOXY PEP (Doxycycline). Consultations are conducted entirely via LINE without requiring app installation, and prescribed medications are shipped nationwide via Yamato Transport with next-day delivery, discreet plain packaging, and optional locker pickup. The service also sells optional at-home STI test kits for HIV, hepatitis B, syphilis, gonorrhea, and chlamydia.

Product overview

JUST IN CASE is an online telemedicine service operated by KARADA内科クリニック (KARADA Internal Medicine Clinic), offering prescription medications for sexually transmitted infection (STI) prevention. The core product portfolio consists of three main offerings: HIV PrEP (プレップ) with TAFFERO EM for pre-exposure prevention, HIV PEP (ペップ) with Taffic for post-exposure emergency prevention, and DOXY PEP (ドキシペップ) using Doxycycline for prevention of syphilis, gonorrhea, and chlamydia. All services are delivered through online medical consultations with certified infectious disease specialists, with medications shipped discreetly via Yamato Transport. Optional mail-in test kits complement these offerings for pre-treatment screening and post-treatment verification. The service operates as a direct-to-consumer online clinic, distinct from the affiliated physical KARADA内科 clinics.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• HIV prevention effectiveness of 99%+ with consistent daily PrEP use
• +2 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature2 records

Partnerships

Five partnerships are on record, tiered core, flagship and minor.

• Hetero Drugs (ヘテロー Drugs / Hetero社)coreTechnology or IntegrationHetero Drugs is an Indian multinational pharmaceutical company that manufactures Tafero EM (タフェロEM) as a generic antiretroviral. JUST IN CASE imports the generic version (Tafero EM / Instgra) through licensed pharmaceutical importer つばめLabo for use in its PrEP program. Hetero's generic is described as having no significant safety difference from originator drugs and being widely used internationally.
• KARADA内科クリニック (physical clinic)coreChannel Partner/ Reseller/ DistributorKARADA内科クリニ is the affiliated physical clinic operated by Medical Corporation OURS. It serves as the physical referral destination for patients using the JUST IN CASE online service who prefer or require in-person consultations, as well as the physical location where the online service's medical director and staff are based.
• 大阪大学 忽那教授 (Professor Kutsuna, Osaka University)flagshipStrategic or Co-development PartnerProfessor Kutsuna of Osaka University, a leading infectious disease researcher, collaborated with Dr. Sato on an in-depth YouTube discussion about DOXY-PEP. This collaboration serves as a key educational and credibility partnership, lending academic authority to JUST IN CASE's DOXY-PEP offering.
• AbemaTV (アベプラ)minorGTM or Marketing PartnerThe JUST IN CASE DOXY-PEP service was featured on AbemaTV (Abema News), providing earned media coverage that drives awareness and customer acquisition.
• つばめLabo (Tsubame Labo)coreTechnology or IntegrationLicensed pharmaceutical importer that sources and imports generic antiretrovirals (Tafero EM and Instgra) from Hetero Drugs and other overseas manufacturers for use in the JUST IN CASE PrEP program. Acts as the import compliance and supply chain partner for overseas generic medications.

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Nurx: US DTC telehealth platform (now part of Thirty Madison) historically offering PrEP, STI testing, contraception, and home delivery prescriptions. Closely comparable model on PrEP/STI prevention telemedicine with at-home testing integration.
• あおぞらクリニック (Aozora Clinic): Japanese clinic network with multiple locations explicitly marketing HIV PrEP services online. Closest direct domestic peer — competes for the same PrEP/PEP patient persona in Japan with overlapping telemedicine and consultation offerings.
• MISTR: US-based, PrEP-focused telehealth platform providing online PrEP prescriptions, at-home STI testing, and direct mail delivery with a similar specialty-prevention model to JUST IN CASE. Direct international comparable for the PrEP-specific vertical.
• ユナイテッドクリニック (United Clinic): Japanese men's-health clinic chain offering ED, AGA, and sexual health treatments with online consultation services. Comparable patient persona, comparable pricing structure, and comparable focus on discreet access to sensitive prescriptions.
• プライベートクリニック (Private Clinic): Japanese men's-health clinic specializing in ED, AGA, and PrEP prescriptions with online consultation options. Direct competitor for Japanese patients seeking discreet access to sexual-health prescriptions, with overlapping telemedicine-and-mail-fulfillment pattern.
• イースト駅前クリニック (East Ekimae Clinic): Large Japanese men's-health clinic chain focused on ED, AGA, and sexual health prescriptions. Comparable in addressing the same stigma-laden, cash-pay, treatment-oriented segment of Japanese patients, though predominantly in-person rather than online-first.

Emerging players

• フィットクリニック (Fit Clinic): Japanese online clinic offering ED, AGA, weight loss, and other sensitive prescriptions with online consultation and mail delivery. Emerging Japanese comparable with similar product breadth (AGA, ED, weight) that may eventually expand into STI prevention.
• MEDLEY (Mediplat / Doctors' Job): Japanese digital health company providing online medical content, doctor-matching, and clinician support tools with adjacent exposure to chronic-condition patient engagement. Emerging player with potential to extend into direct DTC prescription telemedicine.

Broad incumbents

• M3 (Medipal Holdings / m3.com): Large Japanese digital-health and physician platform operating MR-kun, QOL-kun, and other clinician-targeted services, with growing consumer-facing telemedicine. Broad incumbent with the resources to enter or absorb STI-prevention offerings, making it the most plausible large-scale competitive threat.
• Hims & Hers Health: US-listed DTC telehealth platform offering subscription-based prescription treatments for sensitive conditions (ED, hair loss, PrEP, mental health, weight loss) with discrete home delivery. Highly comparable business model: cash-pay subscription, online consultation, mail fulfillment, DTC sensitive-health positioning at much larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about KARADA内科クリニック