Unlock Swordmasters
Blacksmith - Kill 100 opponents in a row at any tea house
Ikumatsu - Finish with the "Path of Blood" ending
Katsu Kaishu - Finish the "100 kills" mode
Kiyokawa Hachiro - Finish the "Formation of Shinsengumi" event
Okita Soji (alternate) - Finish the "1000 kills" mode
Saigo Takamori - Finish the "Heroes of Satsuma" event
Takuan - Finish the "108 earthly desires" mode