Yoshikazu

The father of Mari, Kaoru, Anna, Kanna, and Satoru, the husband of Mariko, and son of Otoki he is the main antagonist of [i]Kichikujima[/i] and it's prequel [i]Zoumotsujima[/i]. He is also a supporting character in the spin-off manga Koisuru Kichikujima.