Denshi Jisho — Online Japanese dictionary

黒蟻 ろあり black ant
Noun 
黒石 ろいし 1: black stone;
2: black (go pieces)
Noun 
蔵人 ろうど 1: keeper of imperial archives;
2: worker at a sake brewery
Noun 
藏人 ろうど 1: keeper of imperial archives;
2: worker at a sake brewery
Noun 
黒帯 ろおび black belt (judo, karate, etc.)
Noun 
黒黴 ろかび black mold; black mould
Noun 
黒髪 ろかみ black hair
Noun, No-adjective 
黒樫 ろがし black oak
Noun 
黒金 ろがね iron
Noun 
黒鴨 ろがも black scoter (duck)
Noun 
黒衣 ろぎぬ black clothes
Noun 
黒熊 black bear
Noun 
黒雲 dark clouds; black clouds
Noun 
黒熊 ろぐま black bear
Noun 
黒々 ろぐろ deep black
Adverb, Adverb taking the 'to' particle, Noun 
黒黒 ろぐろ deep black
Adverb, Adverb taking the 'to' particle, Noun 
黒米 ろごめ unpolished rice
Noun 
黒犀 ろさい black rhinoceros (Diceros bicornis)
Noun, Usually written using kana alone 
黒鷺 ろさぎ eastern reef heron
Noun 
黒炭 ろずみ black charcoal
Noun 
黒鯛 ろだい black porgy (Acanthopagrus schlegeli)
Noun 
黒竹 ろち black bamboo
Noun 
黒茶 ろちゃ deep brown
Noun, Abbreviation 
黒土 ろつち black terracotta; black soil
Noun 
黒鶴 ろづる common crane (Grus grus)
Noun, Usually written using kana alone 
黒貂 ろてん sable (Martes zibellina)
Noun, Usually written using kana alone 

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