Hepatitis C (HCV) in Men – DAA Therapy Achieves SVR Over 95% | Treatment, Risks & Testing

Hepatitis C is liver inflammation caused by infection with the Hepatitis C Virus (HCV). HCV is an RNA virus belonging to the genus Hepacivirus within the Flaviviridae family. It replicates inside human hepatocytes (liver cells), causing chronic inflammation and fibrosis.

A key feature of HCV is that it rarely clears spontaneously and has a high rate of chronicity. Even when acute hepatitis develops, approximately 70% of cases become chronic and can progress to liver cirrhosis or hepatocellular carcinoma over 20-30 years. In contrast, when hepatitis B virus (HBV) is first acquired in adulthood, more than 90% of cases resolve naturally – a significant difference between the two viruses.

• Viral classification: Flaviviridae family, Hepacivirus genus (RNA virus)
• Main transmission routes: Blood (historic transfusions, tattoos, shared needles, etc.)
• Chronicity rate: Approximately 70% (in contrast to adult-acquired HBV)
• Progression rate: 20-30 years to cirrhosis; HCC may develop after 35+ years
• Symptoms: Almost asymptomatic during chronic hepatitis phase (silent disease)
• Treatment: Direct-Acting Antivirals (DAAs) achieve SVR in over 95% of cases

The hepatitis C virus is primarily transmitted through blood. Sexual and mother-to-child transmission occur less frequently than with hepatitis B; instead, past medical procedures and blood-contact activities pose the greatest risk. Most HCV carriers in Japan were infected via blood transfusions or blood products before HCV was identified in 1989, or via shared injection equipment used in older medical practices.

High-Risk Hepatitis C Behaviors in Men

While sexual transmission of HCV is less efficient than HBV, risk rises in HIV-positive individuals and those engaging in anal intercourse. Including HCV testing as part of a standard STI screening panel is recommended.

Hepatitis C symptoms vary significantly depending on the stage of infection. In most cases there are few or no symptoms, and HCV is typically discovered incidentally during health checkups or blood donation screening.

Acute Hepatitis Phase (2-26 weeks after infection)

Chronic Hepatitis Phase (several years to 20 years after infection)

Advanced Stage (Cirrhosis and HCC)

It is dangerous to assume no symptoms means no problem. Detecting and treating Hepatitis C during the chronic phase can prevent progression to cirrhosis and liver cancer, so anyone with a history of risk behaviors should be tested as early as possible.

Hepatitis C diagnosis involves a stepwise process of screening followed by confirmatory testing. Since it can be diagnosed via blood tests alone, the typical workflow is blood draw at outpatient visit, with results explained on a follow-up appointment.

Step 1: HCV Antibody Test (Screening)

Step 2: HCV-RNA Quantitative Test (Confirmation)

Step 3: Genotype and Serotype Determination

Step 4: Liver Function and Fibrosis Assessment

Men's Care Clinic offers HCV testing alongside our STI testing services. If you are concerned about possible exposure, feel free to consult our physicians.

Hepatitis C treatment has come a long way since the interferon era. The current standard is oral Direct-Acting Antiviral (DAA) therapy, which achieves SVR (sustained viral clearance) in over 95% of patients after just 8-12 weeks of treatment.

Major DAA Medications (as of 2026)

Treatment Duration and Efficacy

Medical Expense Subsidy Program

Stories of patients fully cured by DAA therapy continue to grow, and Hepatitis C is no longer a chronic illness – it is a curable disease.

The typical natural course of untreated Hepatitis C is chronic hepatitis to liver fibrosis to liver cirrhosis to hepatocellular carcinoma. In Japan, approximately 60% of hepatocellular carcinoma cases are attributed to HCV, meaning the risk of leaving it untreated is far from negligible.

Risk Over Time

Extrahepatic Complications

Many of these conditions improve after achieving SVR with DAA therapy, making treatment important not only for the liver but for whole-body health.

There is no vaccine against Hepatitis C. Because of the high mutability of HCV, developing an effective vaccine has proven difficult. Therefore, prevention relies entirely on blocking the routes of transmission.

• 1. Never share needles or injection equipment: The single highest transmission risk is injection drug use with shared syringes
• 2. Get tattoos and piercings only at reputable, hygienic facilities: Confirm single-use, sterilized equipment
• 3. Do not share razors, toothbrushes, or nail clippers: They may carry trace amounts of blood
• 4. Use proper protection for sexual activity involving bleeding: Use condoms and avoid mucosal injury
• 5. Tell your healthcare provider about your medical history: Discuss any past transfusions or blood products you received
• 6. Choose dental and acupuncture clinics with high hygiene standards: Confirm disposable instruments are used
• 7. Get tested for HCV regularly if you have risk factors: Annual screening is recommended
• 8. Get tested if your partner is found to be infected: Check for transmission via shared items or sexual contact
• 9. Pre-pregnancy testing for those planning to conceive: Understand the mother-to-child transmission risk (3-5%)

In particular, anyone who received transfusions or blood products before 1992 is strongly encouraged to be tested for HCV. Many municipalities and public health centers in Japan offer free hepatitis virus testing.

At Men's Care Clinic, we provide Hepatitis C testing, diagnosis, and referral coordination in a calm, male-only clinical environment. HCV testing can be added to your STI screening panel upon request.

• Men-only outpatient clinic: A clinical space used exclusively by male patients to ensure privacy
• Comprehensive STI testing panels: Inclusive screening panels that can include HCV
• HCV antibody and HCV-RNA testing: Stepwise testing for accurate diagnosis
• Smooth referral when positive: Seamless referral to hepatology specialists for DAA therapy
• Medical expense subsidy guidance: Support with applications under the Special Hepatitis Treatment Promotion Program
• Three locations: Shinbashi, Akihabara, and Omotesando – all convenient for after-work or weekend visits

I have a history of blood transfusions, My health checkup showed abnormal liver function, or I am worried about STIs and want to be checked for hepatitis too – whatever your concern, our physicians are here to help.