Romulus Hillsborough is an acclaimed expert in the field of Japanese history and culture who lived in Japan for over fifteen years. He has appeared numerous times on television and radio including The History Channel and NHK television. Fluent in spoken and written Japanese, he is the author of Ryoma: Life of a Renaissance Samurai, Samurai Revolution, Samurai Assassins and Samurai Tales. Hillsborough lives in San Francisco, California.
So, what do the Hell's Angels and the Shinsengumi have in common? They both had a propensity for violence, a strict internal code of conduct, and an alarmingly excessive reaction to insult, real or perceived. Also, they probably would have slaughtered each other on sight. -- Goodreads