甲

1. noun carapace; shell
2. 1st in rank; grade A
3. instep; back of hand
4. law the A party (e.g. in a contract); the first party; plaintiff (label in legal documents)

かぶと also 兜 · 冑

1. noun helmet (of a warrior); headpiece

よろい also 鎧

1. noun armor; armour

きのえ

1. noun first sign of the Chinese calendar

かん

1. noun, music treble range (in Japanese music); high note