The Gun Upgrade Materials Kit contains consumable items used as materials to upgrade Sakamoto Ryoma's guns.

The Gun Upgrade Materials Kit contains:
- Obsidian Chunk x1
- Marksman's Fan x1
- Dragon Whisker x1
- Exquisite Cogwheel x20
- Rusty Spring x20
- Small Wind-up Device x15
- Gold Hammer x1
- Kiwami Hammer x1
- Kiwami Seal x2