Thread:Znzn06/@comment-36317532-20180802133058/@comment-27971189-20180802145853

Sakamoto Ryoma is famous hero of revolution in Japan, even without finding literature about him, you can still find a lot of Japanese historical drama where he is the protag/deuteragonist.

Izou is kinda hard to find as he is the least popular among four hitokiri, not to mention the other three hitokiri is actively participating on politics unlike him; then again both is not famous world hero like Achilles or Herc, so the best place to find their complete story about them would be faculty of history on Japanese university.