Transformation Ninja Sword Ninja Ichibantou

Transformation Hidden Sword Ninja Ichibantou (変態隠し剣忍者壱弁当Hentai kakushi ken ninja  ichibantou).

It is the transformation device for the five Ninningers.

Transformation
By Inserting Specific Nin Shurikens the Ninningers press down the transformation button on the sword changer, they then spin the Nin Shurikens similar to Shinkengers.