Hagane no Oni ~Kidou Hohei vs Onna Ninja Gundan~

A monarch died in a certain country of the Far East, and the young heir "Kikuyo Chiyo" took the seat. However, his uncle drafted a female ninja corps to assassinate Kikuyo. The Freedom Association dispatched a special robotic unit secretly to prevent the assassination. Over 50 ninja attacked the cemetery where assassination was decided, but Kikuyo was a decoy and a huge metal robot appeared before their sight instead. How will latest robotic unit fight against female ninja corps that make use of numerous secret techniques?

[From vndbreview]