In 1907 Toyama became Itosu 's assistant at Shuri dojo .
His major teacher was the famous Itosu Yasutsune , with whom Toyama studied for 18 years .
In 1907 Toyama became Itosu Yasutsune 's assistant at Shuri dojo .
His major teacher was the famous Itosu Yasutsune , with whom Toyama studied for 18 years .