There are many words, depending on which type of demon or what folklore it originated from. Some are:
鬼 /o ni/ [ghost-like apparition, ogre] ,
悪魔 /a ku ma/ [devil, demon] ,
夢魔 /mu ma/ [succubus, nightmare demon] ,
外道 /ge dou/ [fiend, evildoer, bad person] ,
天魔 /ten ma/ [evil spirit] and
妖怪 /you kai/ [goblin, apparition, specter, monster].
demon blade in Japanese is akuma no tsubasa
ma o
The Japanese word for 'Demon World' is 鬼の世界.
It's a general Japanese term for demon lord, powerfull demon, or large demon.
Akuma. it means devil or demon.
Ookami means wolf in Japanese and yasha means demon in Japanese. Ookamiyasha means wolf demon in Japanese and yasha ookami means demon wolf in Japanese.
Demon = "Oni" or "Youkai" + Blade = "Katana" or "Ken"
'Beautiful demon' would translate to 美しい鬼 (utsukushii oni) in Japanese.
'Demon girl' would be translated as鬼ã®å°‘女 (oni no shoujo) in Japanese.
"Water" is mizu 水 and "demon" is "akuma" 悪魔。
Hanyo.
Wolf demon in Japanese.