Yamato is a 5★ Katana in Broken Blade, and it sits in a fixed spot rather than dropping randomly. You reach it through Midgard Island, then pay a steep crafting cost made up of money, gems, and several rare katana materials. Nothing about the unlock is hidden behind RNG, so the only real barriers are getting to the right room and grinding the resources.
Quick answer: Travel to Midgard Island through a portal, climb the stairs to the central atrium, and interact with the Yamato weapon in the middle. Then pay 5,000,000,000 Money, 60,000,000 Gems, 6,500 Katana Piece I, 4,000 Katana Piece II, 2,500 Katana Piece III, 10,000 Fire Seed, and 1,000 Red Orb to unlock it.
Where to find Yamato on Midgard Island
The weapon lives on Midgard Island, which you enter using one of the portals in the world. Once you spawn in, the path forward is short and direct.
Yamato unlock requirements
Unlocking Yamato takes seven separate resources. You need the full amount of each one in your inventory at the same time before the weapon will register as claimable. Here is the complete cost.
| Material | Required amount |
|---|---|
 Money | 5,000,000,000 |
 Gems | 60,000,000 |
 Katana Piece I | 6,500 |
 Katana Piece II | 4,000 |
 Katana Piece III | 2,500 |
 Fire Seed | 10,000 |
 Red Orb | 1,000 |
Note: The money and gem totals are by far the largest part of the cost, so most players spend the bulk of their grind there. The three Katana Piece tiers, Fire Seed, and Red Orb are smaller but rarer, so collect them alongside your currency rather than leaving them for last.
How to confirm Yamato is unlocked
When you interact with the weapon and have every material, the unlock completes and Yamato becomes available to you as a 5★ Katana. If the prompt does not let you finish, the cause is almost always a shortfall in one of the seven resources, so re-check the amounts in the table above against your inventory.
The full Yamato move set has not been published yet, so the weapon’s attacks and combos will be detailed once that information is finalized. For now, securing the location and the materials is everything you need to claim it.
