In Assassin’s Creed Shadows, 'The Iron Hand Guild' quest involves finding all four Iron Hand Guild merchant locations and dealing with the Iron Hand himself.
To start the quest, pick it up from Imai Sokun in Settsu after unlocking Yasuke, with objectives involving locating the imposter using Sokun's family name.
There are five Iron Hand Guild members to find across the map: Tamao in Yamashiro, Kin-no-suke in Wakasa, Ginroku in Tamba, Kanta in Omi, and the Iron Hand in Fukuchiyama.
It is recommended to spare the merchants as per Sokun's request, though killing them won't fail the quest, but sparing them comes with rewards.
Locations and strategies for each merchant include eavesdropping on Tamao's workers, confronting Kin-no-suke in Obama, finding Ginroku in Miyzau Bay, dealing with pirates to locate Kanta, and facing the Iron Hand in Fukuchiyama Castle.
Distinct rewards are given for each merchant dealt with, such as unlocking hideout rooms, engravings for armor, and weapons like the Bloody Business long katana.
Returning to Imai Sokun in Sakai after completing the quest rewards players with items like the Fujin’s Tempest trinket, Damage for Alerted Provinces engraving, and gold for upgrades.
For more assistance in Assassin’s Creed Shadows, refer to additional guides on Lost Pages, Kuji-kiri, armor locations, companions, romance options, and a complete walkthrough.