Character Relationship Map: Mirai

Characters

• Kun (played by Moka Kamishiraishi) — protagonist

  Jealous four-year-old boy who time-travels to understand his new sister.

• Mirai (played by Haru Kuroki) — protagonist

  Newborn sister whose arrival changes family dynamics and sparks Kun's growth.

• Father (played by Gen Hoshino) — supporting

  Architect father in Mirai who balances work and family life.

• Mother (played by Kumiko Aso) — supporting

  Executive mother in Mirai who struggles to connect with her children.

• Grandmother (played by Yoshiko Miyazaki) — supporting

  Kun's grandmother who guides him through magical time travel in Mirai.

• Young Man (played by Masaharu Fukuyama) — supporting

  Mysterious young man in the garden who represents time and memory in Mirai.

• Baby Mirai (played by Kaede Hondo) — supporting

  Infant sister whose arrival changes family dynamics in Mirai.

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Mother → Grandmother (Family Daughter)

  In the past, the young version of Mother asks her mother for a pet cat and is scolded by her.

• Father → Mother (Family Spouse)

  Father and Mother jointly manage the household and their children after Mirai's birth.

• Mother → Mirai (Family Mother)

  Mother returns to the office after Mirai's birth, while the family adjusts to caring for the newborn.

• Father → Mirai (Family Father)

  After Mirai is born, Father's attention is focused on the baby while he works from home.

• Mother → Kun (Family Mother)

  Kun is born to an executive mother, and Mother shows him photographs from her childhood to help him understand her.

• Father → Kun (Family Father)

  Kun is born to an architect father, and Father helps him practice riding a bicycle.

• Kun → Young Man (Temporal Future Self)

  Kun discovers that the eighteen-year-old man at Isogo Station is future Kun.

• Mirai → Baby Mirai (Temporal Future Self)

  Baby Mirai appears during Kun's station ordeal, while an older Mirai later arrives to take Kun home.

• Kun → Grandmother (Family Grandson)

  Kun travels to the past and meets his mother as a child, whose mother is identified as Kun's grandmother.

• Kun → Baby Mirai (Family Older Brother)

  Kun rescues Baby Mirai when she is about to board the train to Lonely Land and realizes that he is her older brother.

• Kun → Mirai (Family Older Brother)

  Kun initially resents the attention given to newborn Mirai, but he finally acknowledges that he is her older brother after rescuing her at Tokyo Stati...

Story Analysis

A jealous child uses journeys through family memory and time to understand his sister, parents, and place within generations.

Plot Progression

1. A Sister Enters the House
2. Mirai From Tomorrow
3. Lessons From the Past
4. The Station of Isolation
5. A Family Seen Through Time