If you're looking for manga similar to The Human Chair, you might like these titles.
April 1919 - Chizuru, a girl who lost her voice as a child, is surrounded by a horrific murder case. Chizuru's older brother, an overprotective newspaper reporter, and her kind friend who she spends her after-school hours with.... Chizuru's beloved daily life becomes a thread that weaves a tale of karma when her friend gets caught up in the case...
In the early Showa period, a young girl is found dead in a creek in Tokyo. Officer Sawatari, the police officer in charge of the investigation into the body, catches the eye of one Namidako Inukai, the founder of a new religious organization.
Fumi and Haru are two university friends with a shared passion for the swim team, until Fumi's "unique" heritage complicates matters.
Taisho year 12 (1923). A tragedy occurring in Hinamizawa changes the fate of a lone girl and her friends. The turbulent early life of Oryou, head of the Sonozaki family, one of the Three Great Families, who would later be feared and known as Empress Sonozaki.
Recently, a destructive earthquake levelled several towns, and revealed a 2 km long fault on Amigara mountain. It is here that Owaki, Yoshida, and others have come to witness the mysterious, human-sized holes that line the fault. Each hole seems to be the perfect match for one of the visitors. What will happen if they go inside?