Ninja Ryukenden (Ninja Spirit) is an arcade game. The variations in set number likely indicate different revisions or regional releases. Gameplay would involve action, adventure, and likely fighting elements characteristic of the Ninja Gaiden franchise (if related). More information on the developer and specific release details would require further investigation.

Ninja Ryukenden (Japan, set 1)

Ninja Princess (315-5051?, 128k Ver. version?)