101Leafy researched the games.
Ninja Sword

Despite its short, thin blade, this small sword is useful in fighting wyverns.
| Class | Sword |
|---|---|
| Rarity | 5 |
| Attack | 224 |
| Affinity | 25% |
| Slots | 0 |
| Price | 15,000z |
Upgrades
| Upgraded from | Holy Saber |
|---|---|
| Upgrades into | Hi Ninja Sword |
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 704.
Materials
Daora Webbing ×4, ChameleosWebbing ×4, Fire Drgn Webbng ×4, Remobra Skin ×10