[2][3] Homma, whose father was a Shinto priest and an officer in the Japanese Imperial Army during the war, was born in Akita Prefecture.
According to Homma, at the age of 14, he was sent by his father to train in Iwama under aikido founder Ueshiba Morihei.
Homma also says that he trained as an uchi deshi in Iwama and at the Aikikai Hombu Dojo in Tokyo, under the founder and under Saito Morihiro in the late 1960s[clarification needed].
Along with Hideo Hirasawa, Homma is one of a number of aikidoka who claim to be the last uchi deshi to have been trained directly by Ueshiba Morihei.
AHAN activities have included sending computers and aid to an orphanage in Mongolia, supporting a sick aikido student in Nicaragua, and assisting dojo in Turkey and Brazil with charitable fundraising efforts.