Gosho Motoharu (五所 元治; 1919 – October 27, 2012) was a prominent Japanese master of the martial arts, koryu budō or kobudō.
The Shihan (master), of the schools Niten Ichi Ryu (created by the famous rōnin Miyamoto Musashi) and Sekiguchi Ryu, Gosho Motoharu was awarded the rank of Menkyo kaiden, in both schools.
He was chosen by Aoki to be shihan and adjunct successor of both schools to ensure the teachings of the ryus to the future generations.
In 2007, his son, Yoshimochi Kiyoshi, succeeded Kiyonaga Fumiya, as 11th successor, at the request of the Kiyonaga family, and become the 12th successor (daijunidai seito shihan) of Hyoho Niten Ichi Ryu, reuniting the Gosho Ha and Seito (main) lineages.
Shihan Gosho transmitted the original teachings of Hyoho Niten Ichi Ryu to the masters Kiyoshi Yoshimoti, Ishii Toyozumi, Shigematsu Isao, and Jorge Kishikawa.