Warlord Harunori runs the Mongol occupation of Azamo Bay. After the slaver there dies during Taka's rescue, he locks down the town. You duel him to free the bay in the side tale Unfinished Business.
Free the elders and peasants, then go to his house. He offers peace if Tsushima accepts Mongol rule. Jin calls him a coward and a liar, and they duel.
Jin kills him and swaps the Mongol flags for the villagers' own, ending the occupation.
Baku the Voiceless
Baku the Voiceless is a silent vendor who appears only in New Game+. You find him on the small island at the centre of Lake Izuhara, in Ariake. He sells armour, dyes, charms, hats and masks for Ghost Flowers.
Bataar
Bataar is the Mongol general behind the attack on Komatsu Forge. Jin and Yuna fight him while defending the forge in Hammer and Forge.
Bettomaru
Bettomaru is the master of the Way of the Flame who lives in a dojo at the top of Mount Jogaku. You climb through a snowstorm to duel him in the Mythic Tale The Undying Flame, and he teaches Jin the technique during the fight.
Black Dye Merchant
The Black Dye Merchant is a hidden vendor in a cave east of Kawamata Village in Kushi, Toyotama. He sells deep black armour dyes and cosmetics for Flowers.