 This use-results post-marketing surveillance PMS study for Sovaldi tablets sofosbuvir, SOF administered in combination with Rebetol capsules ribavirin, REB will evaluate the safety and efficacy of SOF administered in combination with ribavirin under real world use in Japan. Among adult patients with chronic genotype 2 hepatitis C virus HCV infection and treated with SOFribavirin in routine clinical use, the primary objective of this study is to evaluate the incidence of adverse drug reactions ADRs under real world settings. 