日本的肝病大部分为病毒性肝炎及以其为起因的。其基础、临床方面的研究成果敏感地通过日常医疗工作反映出来。甲、乙型肝炎的诊断已经明确,并又能进行详细的病毒学分析,也能应用抗病毒制剂进行治疗。对非甲非乙型肝炎尚不能确定诊断,但在其诊断、病理分析之前,正试行抗病毒的药物治疗。至于D 型肝炎(δ肝炎),在日本少见,目前主要进行流行病学研究。随着肝硬化的预后良好,长期存活者增加,肝细胞癌发病率正在上升。由于图像诊断,尤其是超声波检查的进步、普及,使较小的肝细胞癌也能早期发 Most of Japan’s liver disease is viral hepatitis and its causes. Its basic, clinical research results are reflected sensitively through routine medical work. A, Hepatitis B diagnosis has been clear, and can conduct a detailed virological analysis, but also the application of antiviral agents for treatment. The diagnosis of non-A, non-B hepatitis can not be confirmed yet, but antiviral drug treatment is being conducted before its diagnosis and pathological analysis. As for hepatitis D (delta hepatitis), which is uncommon in Japan, epidemiological studies are mainly conducted at present. With the good prognosis of cirrhosis, long-term survival increased, the incidence of hepatocellular carcinoma is on the rise. As the image diagnosis, especially the progress of ultrasound examination, the popularity of small hepatocellular carcinoma can also be made early