Onimusha: Way of the Sword lets you buy key upgrade materials from Yorimasa

GG Brief Editorial Desk · AI-assisted, source attributed

A few hours into the game, after purifying the Yasui Konpiragu shrine, the guardian spirit Yorimasa opens a shop that sells crafting and upgrade materials for red souls. Yorimasa's inventory expands after each major story mission and eventually includes commonly farmed items and rarer crafting components. Buying these materials speeds weapon/ability upgrades and reduces the need to grind hub-world drops for leather, iron and other resources.

• Purify Yasui Konpiragu shrine early in the campaign to unlock Yorimasa’s shop; it appears a few hours into the game.
• Yorimasa sells upgrade materials in exchange for red souls and expands his inventory after every major story mission.
• Shop stock eventually includes Leather, Fine Silk, Tempered Iron, Tamahagane, Malacite Mass and Byakue’s Talisman.
• Those materials are used to increase damage, health, stamina and the Oni power gauge, and to unlock skill-tree abilities, allowing players to bypass extensive grinding.