Gaku Homma (born 1950 in Akita Prefecture, Japan) is a Japanese aikido instructor and author. He is the founder and chief instructor of Nippon Kan, an aikido dojo and cultural center located in Denver, Colorado, United States.
Homma began his martial arts training in judo and kendo during his youth. He started practicing aikido in 1968 under the instruction of Mitsugi Saotome and later became an uchi-deshi (live-in student) at the Aikikai Hombu Dojo in Tokyo, where he trained under Kisshomaru Ueshiba (the second Doshu) and other senior instructors, including Seigo Yamaguchi and Hiroshi Tada.
In 1978, Homma moved to the United States and established Nippon Kan in Denver. The organization functions as both a martial arts school and a cultural center, hosting events related to Japanese arts such as calligraphy, tea ceremony, and Ikebana. Homma is known for integrating traditional Japanese cultural education into his aikido curriculum, particularly through programs designed for children.
He is the author of several books on aikido and its philosophy, including:
- Aikido for Life (1990)
- The Structure of Aikido (1997)
- Children and the Martial Arts: An Aikido Point of View (1993)
- Aikido Sketch Diary: Dojo 365 Days (1994)
Homma holds the rank of 8th dan in aikido, awarded by the Aikikai Foundation. He continues to teach at Nippon Kan and conduct seminars internationally.