Meeting the Ronin is the first quest given by Omurai.
Note - this is an automatic battle fight.
Before: You are just a foreigner, you do not belong here! You would not even last 6 turns against me.
During: I don't like foreigners…
(Note - You don't actually have to kill Omurai, just last 6 turns. The quest currently completes even if Omurai kills you on his 6th attack.)