Haichi

Haichi (葉一) is a Japanese educator and YouTuber, born on 11 March 1985, who studied at Tokyo Gakugei University. Under the name Toaru Otoko ga Jugyō o Shite Mita, he publishes more than 2,000 free lesson videos on YouTube covering elementary school arithmetic, junior high school mathematics, science, English, Japanese and social studies, high school mathematics and preparation for high school entrance exams, with accompanying printable worksheets offered free through his site 19ch. His X account had 85,129 followers in February 2023.