Sotaro Yasaka (played by Tadanobu Asano) is a protagonist in Harmonium.
A recently released ex-convict and old acquaintance of Toshio. He moves in with the family, helps at the shop, and bonds with Hotaru. He confesses to Akie that he took the blame for a murder Toshio participated in. After developing a romantic and sexual tension with Akie, he disappears following an incident where Hotaru is severely injured. He is later revealed to be Takashi’s biological father and a former yakuza member. Akie Suzuoka (played by Mariko Tsutsui) is a protagonist in Harmonium.
Toshio’s wife and Hotaru’s mother. She initially welcomes Yasaka into their home but develops an inappropriate romantic relationship with him. After Yasaka’s violent overreach, she becomes fiercely protective of her now-disabled daughter. She confronts Toshio about his past complicity in a murder, later attempts to take Takashi to kill Yasaka, and ultimately suffers a psychological breakdown, jumping off a bridge with Hotaru. Takashi Yamagami (played by Taiga Nakano) appears in Harmonium.
A new assistant hired by Toshio eight years after Yasaka's disappearance. Raised by a single mother, he sketches the now-disabled Hotaru. He reveals he is Yasaka’s illegitimate son and was hired based on his father's letters. After being rejected by Akie, he accompanies his mother and Toshio to confront Yasaka, refusing to kill his own father. He later pulls Hotaru from the water. Hotaru Suzuoka (played by Momone Shinokawa) appears in Harmonium.
The Suzuki daughter who practices the harmonium. She initially bonds with Yasaka, but her life changes drastically after a violent incident involving him leaves her injured. Eight years later, she is disabled and non-verbal, prompting her mother's extreme protective behavior. She is taken off a bridge by Akie and remains in an ambiguous, unconscious state at the film's end. Toshio Suzuoka (played by Kanji Furutachi) appears in Harmonium.
A garage machine shop owner and Akie’s husband. He takes in the reformed Yasaka, unaware of the dark history. He grows suspicious of his wife's affair with Yasaka. He eventually confesses to holding down a murder victim alongside Yasaka. Driven by guilt and desperation, he pursues Yasaka, tries to resuscitate his family after the bridge incident, and bears the film's heavy emotional burden.
Harmonium (2016) character relationship network mapped with AI analysis. Explore the connections, alliances, and conflicts between characters.
Characters
Sotaro Yasaka
(played by Tadanobu Asano) — protagonist
A recently released ex-convict and old acquaintance of Toshio. He moves in with the family, helps at the shop, and bonds with Hotaru. He confesses to Akie that he took the blame for a murder Toshio pa...
Akie Suzuoka
(played by Mariko Tsutsui) — protagonist
Toshio’s wife and Hotaru’s mother. She initially welcomes Yasaka into their home but develops an inappropriate romantic relationship with him. After Yasaka’s violent overreach, she becomes fiercely pr...
Takashi Yamagami
(played by Taiga Nakano) — supporting
A new assistant hired by Toshio eight years after Yasaka's disappearance. Raised by a single mother, he sketches the now-disabled Hotaru. He reveals he is Yasaka’s illegitimate son and was hired based...
Hotaru Suzuoka
(played by Momone Shinokawa) — supporting
The Suzuki daughter who practices the harmonium. She initially bonds with Yasaka, but her life changes drastically after a violent incident involving him leaves her injured. Eight years later, she is...
Toshio Suzuoka
(played by Kanji Furutachi) — supporting
A garage machine shop owner and Akie’s husband. He takes in the reformed Yasaka, unaware of the dark history. He grows suspicious of his wife's affair with Yasaka. He eventually confesses to holding d...
Canonical Relationships
Family, romantic, and professional connections based on plot evidence.
