Gokurin

Source: npc/quests/ninja_quests.txt

1. Talk to Kaibara (Ninja weaponsmith).
2. Choose Gokurin -> Yes! I want one!.
3. Turn in Dragon Scales x400, Oridecon x5, Dragon Skins x30, 200,000 zeny.
4. Kaibara verifies and crafts the weapon.
5. Reward: getitem 13006,1 (Gokurin).