Mr. Osomatsu Season 3 Episode 15 Cosplaymatsu ( Air Date 2021-01-18 ) Genre Animation, Comedy category. Overview "Another collection of miscellaneous skits, featuring Ichimatsu as a pessimistic policeman, Chibita trying out a new gimmick for his cart, Osomatsu receiving the death penalty, and Choromatsu's miraculous reincarnation as a mosquito.".