Translation

The Japanese word for "Bat" is koumori コウモリ.

Romaji ko u mo ri
Hiraganaこうもり
Katakanaコウモリ
Kanji 蝙蝠
School Level ✕, ✕

Loan-word

The word "Bat" katakanized would be batto バット.
Romaji ba tto
Katakanaバット
Hiraganaばっと

Further Reading

Wikipedia: Bat (コウモリ)
Bat-Eared Fox.