The Shigenori's Peak Pillar of Honor is a memorial shrine at Shigenori's Peak in Kashine, Izuhara. Visit it to collect the Spring Bamboo sword kit, a cosmetic look for Jin's katana and tanto.
Travel to Shigenori's Peak in the Kashine prefecture of Izuhara and look for the stone pillar. The Kashine Haiku is right next to this pillar, so write the poem while you are here.
Interact with the pillar to take the Spring Bamboo kit, then swap it on in the gear menu.
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.