"Frog" is 'kaeru' in Japanese, written: カエルThe word FROG is not a Japanese word, so it wouldn't mean anything in Japanese.The Japanese word for Frog is カエル
You may say 'kaeru,' written: カエル
its kuro
kokuchou
kuroji
kuroari
kuroikokoro
Kurotsuki
Kokushibyou
Kuro Aisu=Black Ice
Kuroi sora is black sky.
kuroi no kumo