fumetsu <img src="http://www.df.lth.se/cgi-bin/j-e/inline/jap/%c9%d4%cc%c7?TR">
Uh, please forgive me for I do not know how to say "the" in Japanese but "Fumetsu" is immortal im Japanese. :) Hope I helped.
不滅の雨 Fumetsu no ame
我が不死身よ (waga fushimi yo) is a fitting way of saying that in Japanese.
Fumetsu no
How about "Fumetsu" it can be translated into Undying, Immortal or indestructible.
不死の子供
Fukyuu. Not pronounced like the English swear word, but pronounced "foo kyoo".
It is: 不死鳥, literally "immortal bird."
It is a base of a Japanese legend, so yes immortal.
unsterblich
immortel, immortelle
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