Answer
The first shogun, Minamoto no Yoritomo, established the Kamakura shogunate in 1192, marking a pivotal moment in Japanese history. As shogun, Yoritomo wielded immense power, effectively becoming the de facto ruler of Japan. His legacy endures as a symbol of the transition from imperial rule to the dominance of the samurai class, shaping the course of Japanese politics and society for centuries to come.