101Leafy researched the games.
Kitchen Knife

The soul of a chef. "The art of cooking is about love, not war!"
| Class | Sword |
|---|---|
| Rarity | 2 |
| Attack | 112 |
| Affinity | 10% |
| Slots | 0 |
| Price | 510z |
Upgrades
| Upgraded from | Assassin's Dagger |
|---|---|
| Upgrades into | Iron Chefblade |
Can also be made new at the smithy.
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 700.
Materials
FlynMealPassReg ×2, Iron Ore ×3, Antiseptic Stone ×1