Ghost of Yōtei materials & ammunition capacity

Check Ran for arrows, Ina for bombs and Murata for bullets. Use in-game menus for exact costs by weapon, level and mode.

Material	Where and how	Used for
MetalsMetals	All regions Gather ore while exploring. Keep a supply for early melee weapon upgrades.	Melee weapon upgrades at Father’s Forge
Oni Raider Mask PiecesOni Raider Mask Pieces	Ishikari Plain Defeat Oni Raiders and loot their bodies. Check camp loot in this region as well.	Mid-tier weapon and armor upgrades
Shinobi SteelShinobi Steel	Teshio Ridge Collect loot after defeating Nine Tails shinobi and clearing their hideouts.	Weapon and armor upgrades
Gun PartsGun Parts	Oshima Coast Progress the story to reach Oshima Coast, then search gun-wielding enemies and camps.	Firearm upgrades and the final upgrades for several other weapons
Rare Metals / Precious MetalsRare Metals / Precious Metals	Ore deposits and loot chests Check golden ore deposits and camp reward chests.	Higher-tier melee upgrades and some carrying-capacity upgrades
Wood / Rare WoodWood / Rare Wood	Gathered while exploring Bring wood to Ran for bow upgrades. Save Rare Wood for higher-tier upgrades.	Bow upgrades and increased arrow capacity
Black PowderBlack Powder	Merchants and loot Bring it to Ina as a material for bomb upgrades.	Improved bomb performance

Find an upgrade vendor

Atsu’s Home. Katana, Dual Katana, Yari, Odachi, and Kusarigama upgrades

Yotei’s Shadow Inn, after completing The Old Inn early in the story. Bow purchases and upgrades; carrying capacity for each arrow type

Ishikari Plain. Bomb upgrades and increased carrying capacity

Murata’s Workshop, Oshima Coast. Matchlock and pistol upgrades, increased ammunition capacity, and ammunition purchases

Inn hubs. Armor upgrades

Some upgrade costs differ between sources; no definitive price table is given. Infinite farming and ore respawn times are unverified.