Aka, gosai, reddo, akai, ni, or niiro
Akame
Akai sakana is red fish.
Red in Japanese is "aka" (赤).
Aka no shi
赤い犬 (akai inu) would mean "red dog" in Japanese.
"Akai kaze."
akai kage
taiyou akai taiyou- sun akai- red
Aka donabe
aka tsuki no yume
Red ant in Japanese is 'akai ari' (赤いアリ). Akai (赤い) - red Ari (アリ) - ant
Red sky in Japanese is 'akai sora' (赤い空). 赤い - red 空 - sky