Forgemaster's Headband is a headband hidden inside the swordsmith's building at Komatsu Forge in Izuhara. It has no map marker, so use the Guiding Wind set to vanity gear to find it.
It sits inside the swordsmith's building at Komatsu Forge, Izuhara. Climb onto the roof, drop in through the hole and edge around the wooden beam to reach it. The flavour text ties it to the forge's workers.
Aaruul
Aaruul is one of the 50 Mongol Artifacts, pieces of the invaders' culture and warfare you can study. It sits at a camp south of Izuhara Clearing in Izuhara, and finding 20 artifacts counts toward the Know Your Enemy trophy.
Adachi Dragon Mask
Adachi Dragon Mask is a New Game+ mask sold by Baku the Voiceless for 5 Ghost flowers. It does not exist in a first playthrough.
Adak Tree
Adak Tree is one of the 50 Mongol Artifacts, pieces of the invaders' culture and warfare you can study. It sits at Yoichi's Crossroads in Izuhara, and finding 20 artifacts counts toward the Know Your Enemy trophy.
Adventurer's Fortune
Adventurer's Fortune is a dye for Traveler's Attire. It costs 10 flowers at the Izuhara merchants. Like every dye it only changes colours.