Translation

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

Romaji ko u mo ri
Hiragana
Katakana
Kanji 蝙蝠
School Level ,

Loan-word

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

Further Reading

Wikipedia: Bat (コウモリ)
Bat-Eared Fox.