Here are the various parts of the bogu (kendo armor):
Valid striking points during kendo shiai can depend slightly on what kamae is adopted by your opponent.
AGAINST CHUDAN-NO-KAMAE, the following indicates valid striking areas:
(RED areas/targets are not valid)
hidari dou IS a valid target area, but the illustration above did not permit enough room to indicate this.
AGAINST JODAN-NO-KAMAE, the following indicates valid striking points:
AGAINST NITO-RYU (TWO-SWORD STYLE), the following indicates valid striking points: