Welcome to TO BUILD AN EMPIRE, the double-approved fanlisting for the character Sanada Genichirou from Konomi Takeshi's Tennis no Oujisama (including its sequel, Shin Tennis no Oujisama and Musical Tennis no Oujisama) in his manga, anime, and musical forms. If you're a fan of the Emperor in all his grunting, grumbling, tarundoru'ing glory, please feel free to join!