Hisanobu Sakamoto

As the husband of Yukie Sakamoto, this Tokyo native plays a pivotal role in the family dynamic as Ryouta Sakamoto’s stepfather. Though his presence is defined by his domestic ties to the Sakamoto household, his connection to the central protagonists establishes his importance within the unfolding narrative. Through his marriage and familial bonds, he remains a key figure in the lives of the main characters.