"Aichaku" translates to attachment in the Japanese language, but tends to be used towards the attachment between a person and place or thing, not two people.
Christopher McCombs wrote the part of Ken specifically for Christopher Nishizawa.
Kosuke Imai and Christopher McCombs previously worked with directors Raito Nishizaka and Michael Williams on the television series "The Benza" and "Benza English". Christopher Nishizawa provided voice work for the video game adaption of the show called "The Benza RPG".
Was made with the official support of the Chiba Prefecture Film Commission.