Kotohogushi-hen, it was revealed that Hanyū's real name was , and that she had a child, Ōka, with the Shinto Priest Riku whom she rescued him as a baby in a house fire. Secondary Satoko's older brother, and Teppei and Tamae's nephew. He disappeared a year before Keiichi moves to Hinamizawa. In some arcs, he's mentioned a lot throughout the story as it's revealed that he had 'transferred' which isn't elaborated on but it turns out right before that, he also displayed signs of paranoia and aggression. He and Satoko cannot distinguish the differences between cauliflower and broccoli as they are both colorblind. He is referred to by her as nii-nii, a childish form of the Japanese word . According to the TIPS in Meakashi-hen, he boards the Shinkansen bound from Nagoya to Tokyo. It was revealed before Matsuribayashi-hen to be a result of him trying to abandon his home as his protection for Satoko from Tamae; taking the latter's harsh abuse meant for her became mentally overwhelming for him, he contemplates abandoning Satoko to free himself from this burden but he changes his mind a few moments later. In the sound novel, manga, and anime series, in Meakashi-hen, Shion falls in love with him after he saved her from delinquents attempting to beat her up. When he kills Tamae on the night of the festival, despite Shion's effort to cover for his alibi by lying to Ooishi who suspected him. Combined with the stress of taking care of Satoko and the murder, he succumbs to the terminal level of the Hinamizawa Syndrome. In Matsuribayashi-hen and Miotsukushi-hen. it is revealed that Irie put him under heavy sedation in the underground parts of his clinic as it's revealed that right after picking Satoshi up after the latter purchased a teddy bear for Satoko's birthday. Inside his car, he confessed to Irie about murdering Tamae while also claiming he saw many people resembling Tamae and attempting to claw his throat which Irie realized he's at Level 5 of the syndrome, and took him to his clinic to restrain and treat him. Irie confides Satoshi's true whereabouts only to Shion so that she can visit him many times in hopes that he will one day wake up and reunite with Shion and Satoko. The village's tutelary deity, also known as Oyashiro-sama. Her sacred shrine is full of ancient torture equipment. Legend says that