The franchise has repeatedly returned to ninja imagery, including Kakuranger, Hurricaneger, and Ninninger.

Each one approached the subject differently.

Kakuranger leaned heavily into Japanese folklore and yokai.

Hurricaneger emphasized ninja schools and modern technology.

Ninninger focused strongly on family inheritance and the legacy of legendary ninjas.

The repeated use of the theme demonstrates how flexible Super Sentai can be when revisiting familiar ideas.