Professor Shuchirou Amachi is Nozomu's father and an amateur astronomer who runs the Amachi Institute. His wife Yuko works away from home and rarely comes home. He hires the Goseigers as part-time workers, unaware of their actions. Regardless, Amachi aids them on certain occasions and eventually learns the truth about the Gosei Angels from Master Head after agreeing to be his medium to talk through due to being of pure heart. He returns a few years later when the Space Empire Zangyack begin their second assault on Earth. He carries an injured boy to nearby paramedics when Joe and Doc observe his unwillingness to give up.