Many people are familiar with my idea of a Hollywood film based on my book about “Renaissance Samurai” Sakamoto Ryoma. And recently I’ve been contemplating a movie based on my “Samurai Revolution”— the story of the tumultuous and bloody conflict between the shogun’s government and samurai hell-bent on overthrowing it — co-narrated by the “shogun’s last samurai” Katsu Kaishu and his friend Ernest Satow, interpreter to the British minister to Japan.