Told from the viewpoint of the father Morio, "A Boy Called H" follows a young boy named Hajime Senoh, nicknamed "H". His father, Morio runs a tailor shop. With the onset of World War II, their family must endure difficult times. Nevertheless, H is filled with curiosity and a sense of justice. Based on the autobiographical novel "Shonen H" by Kappa Senoh (published by Kodansha, July 9, 1999).
| Actor | Role |
|---|---|
 Yutaka MizutaniMorio Senoh | Morio Senoh |
| TTatsuki YoshiokaKaoru Senoh (H) | Kaoru Senoh (H) |
 Ran ItoToshiko Senoh | Toshiko Senoh |
 Yurine HanadaYoshiko Senoh | Yoshiko Senoh |
 Shun OguriNot listed | Not listed |
 Taichi SaotomeNot listed | Not listed |
 Kuranosuke SasakiNot listed | Not listed |
 Taizo HaradaNot listed | Not listed |
 Ittoku KishibeNot listed | Not listed |
 Jun KunimuraNot listed | Not listed |
 Gaku HamadaNot listed | Not listed |
 Hatsuo YamayaNot listed | Not listed |
 DendenNot listed | Not listed |
 Satoshi JinboNot listed | Not listed |
| KKoji SatoNot listed | Not listed |
| MMakoto KakedaNot listed | Not listed |
 Hajime InoueNot listed | Not listed |
 Kozo SatoNot listed | Not listed |
 Suzunosuke TanakaNot listed | Not listed |
 Hideki NakanoNot listed | Not listed |
 Sawa MasakiNot listed | Not listed |
 Tomoya MaenoNot listed | Not listed |
| MMasakazu SerizawaNot listed | Not listed |
 Takashi YamanakaDetective | Detective |