'Warrior nation' may be translated as either ????? (senshi no kokka) or simply ???? (senshi no kuni) in Japanese.
There are several words for 'warrior' in Japanese, but a possible translation would be musha ookami.
warrior is "musha" I don't know what magic is in Japanese though, sorry
Kage Senshi
勇士 Yūshi
The phrase 'warrior of knowledge' would most likely be translated as????? (chishiki no senshi) in Japanese.
Ninja is already Japanese. In English it is 'Shadow warrior', it is equivalent to assassin or secret agent.
女戦士 Jo senshi
????? (senshi no himesama) means 'warrior princess' in Japanese.
The samurai is a Japanese warrior, not Chinese.
"Warrior's wish" translates to either????? (senshi no kibou) or ????? (senshi no negai) in Japanese.
In Japanese 影武者 (kagemusha) is "shadow warrior."
"Warrior prince" in Japanese can be translated as "戦士王子" (senshi ouji).