Touichirou Mochizuki

Touicirou Mochizuki is the father of Touya Mochizuki.

Trivia

 * His first name is taken by combining the first kanji of Touya's name, Tou (冬), and the common Japanese male name suffix, Ichirou (一郎), together.
 * The Ichirou part (一郎) itself means "first son".