A local epidemiological survey of psoriasis was conducted from 19 February to 30 June 2016 in Matsumoto city, Nagano Prefecture, Japan. Patients were predominantly male (268 cases, 71.5% males vs 107 cases, 28.5% females). We estimated that the prevalence of psoriasis was 0.097% in the Matsumoto area. The clinical types of psoriasis identified were psoriasis vulgaris (90.7%), psoriatic arthritis (5.9%), pustular psoriasis (2.1%), guttate psoriasis (1.0%) and psoriatic erythroderma (0.3%). The topical therapeutic agents included corticosteroids (84.0%), vitamin D