Toshihiro Gotô

"Okasan no Hibaku Piano" features a protagonist modeled after Mitsunori Yagawa, 67, a piano tuner who lives in Hiroshima's Asa-Minami Ward. (http://www.asahi.com/ajw/articles/13318060)

Based on the manga series "Yume no Kayoiji" by Yasuyuki Ohno (first published January, 1987 by biweekly seinen manga magazine Young King).