Translation

The Japanese word for "Brown Rat" is dobu-nezumi 溝鼠.

Romaji do bu ne zu mi
Hiraganaどぶねずみ
Katakanaドブネズミ
Kanji 溝 鼠
Meaning Sewer Rat
School Level 中 ✕

Synonyms

Common Rat, Street Rat, Sewer Rat, Hanover Rat, Norway Rat, Norwegian Rat, Parisian Rat, Water Rat, Wharf Rat.[1]
Scientific name: Rattus norvegicus.

Further Reading

Wikipedia: Brown_rat (ドブネズミ)
  1. 七郎鼠 - kotobank.jp, accessed .