A Ninja Tool Shop is a store that sells Ninja Tool's to any shinobi. These stores are normally decorated with a weapon of some sort in front to show that they are selling Ninja Tools.
There is currently three Ninja Tool Shops available, each in their own village.
Gorou's Ninja Tool Shop (Leaf Village)
Located North-West of the Leaf Village's main gate and is on the path that leads to the administrator building(mid-north).
Tomoni's Ninja Tool Shop (Sand Village)
Located outside Pal's Weapon Shop, east of the Administration Office in the middle of the village.
Kaito's Ninja Tool Shop (Takumi Village)
Located North-west of the village gates near the entrance. It's the only tool shop where you can purchase a bulk of 100 tools at once for only 130 Ryo
Tanzaku's Ninja Tool Shop (Tanzaku Quarters)
Located South-East in the village close to the entrance in a twin building alongside a weapon shop.
Garou, Tomoni and Tanzaku's tool shops contain these tools for this price. Only Kaito's tool shop sells in bulk of 100 tools for 130 R