|Cause of death||Drowned|
|Appearances||Fatal Frame: Maiden of Black Water|
|Voice actor (Jp)||N/A|
|Voice actor (Eng)||N/A|
Chiaki was a schoolmate of Fuyuhi and Haruka. She convinced her friends Fuyuhi, Haruka, Natsuho and Tsuyuno to commit suicide with her on Mt. Hikami while under the influence of a Guardian. All five walked out into a lake, hand in hand. All the girls drowned except for Fuyuhi and Haruka, who survived and carried the secret of what had happened between them.
- The five girls' names have a seasonal theme. Chiaki's name correlates to autumn.