I can only think of one word that means dark in Japanese. It is K-U-R-A-I.
Lightning=Inazuma
kabutaoi chamaku
inazuma no kitsune you do realise this will make absolutely no sense to a Japanese
Azaki
kuraihana
Lightning=Inazuma
kabutaoi chamaku
inazuma no kitsune you do realise this will make absolutely no sense to a Japanese
Lightning Flash in Japanese is 'Inazuma.'
Azaki
kuraihana
kuraitaiyo
kuraikokoro
ダークデーモン
The phrase 'dark storm' would be 暗い嵐 (kurai arashi) in Japanese.
The Japanese word for lightning is Inazuma.
kurai mori