Katsuya is the son to
Sachie Tokunaga and brother to Hitomi Tokunaga.He is happily married to Kazumi.
Moving in and Death[]
Katsuya leaves for work and comes back later.He finds Sachie who is in an state.He then finds Kazumi in an near death experience.He is then confronted by Toshio Seaki.Katsuya dies and he is possessed by Takeo Seaki and chucks out Hitomi.He then drags Kazumi away into the attic and is killed by Kayako Seaki.He is later seen with Kazumi in the attic.