An Ittō-ryū swordsman living as a mask-maker. Determined to conceal his past from his son, Renzo, he is also the man who led the rape of Rin's mother. He first appears in On Silent Wings part 1, and is later killed by Manji in On Silent Wings part 6. Renzo then attacks Manji in rage, Manji feigning death. Renzo then makes an assumption his father had a sordid past with Rin at his father's burial, when Rin says, hypothetically, that there are some reasons past incidents shouldn't be brought up, as the blissful ignorance is better than the lifetime of shame. He appears in On Silent Wings (I-VI).