鼠

whistling of a prostitute (to attract customers)

rattrap

salmon shark (Lamna ditropis)

black rat; roof rat

field mouse

salted entrails of a sea cucumber; salted entrails of a trepang

boiled pine pitch and oil (traditionally used as a glue in archery, etc.)

sea squirt; ascidian

Word usually written using kana alone

Japanese grass vole (Microtus montebelli)

any rodent of subfamily Arvicolinae (incl. voles, lemmings and muskrats)

jerboa (any rodent of family Dipodidae)

dragonet (any fish of family Callionymidae, esp. Richard's dragonet, Repomucenus richardsonii)

field mouse; meadow mouse

Japanese arborvitae (Thuja standishii)

grey tinged with brown (gray)

plague; pest

greater bandicoot rat (Bandicota indica)

Japanese water shrew (Chimarrogale platycephala)

pocket gopher

corrugated iron sheet

lemming

ground squirrel (esp. a ground squirrel of North America or Africa)

rat's nest

small Japanese field mouse (Apodemus argenteus)

gray satin fabric

harbor porpoise (Phocoena phocoena); harbour porpoise; common porpoise