This is a cosplay costume of a Japanese ninja killer, which includes a helmet, mask, clothes, and shoes.

The design of these costumes is inspired by the ninja culture in Japan, showcasing their bravery, intelligence, and ruthlessness.

The red decorations on the helmet symbolize the ninja's courage and determination, while the mask hides their face, adding to the mystery.

The black patterns and white details on the clothes demonstrate the ninja's elegance and strength.

The shoe design also echoes the overall style, with a contrasting black sole and white upper that highlights the entire look.

This cosplay costume not only has visual impact but also allows people to feel the charm and historical significance of Japanese ninja culture.