ライン川[raingawa] (river) Rhine
安倍川餅[abekawamochi] rice cakes (mochi) with Kinako
川床[kawadoko] riverbed
河川[kasen] rivers
江川る[egawaru] to (try to) act like a big-shot

香川県[kagawaken] Kagawa prefecture (Shikoku)
三途の川[sanzunokawa] Sanzu River (Buddhist equivalent of the River Styx)
山川[sansen] mountains and rivers
四川[shisen] Sichuan (China)
小川[ogawa] streamlet

河獺[oso] otter (Lutra lutra)
獺虎[rakko] sea otter (Enhydra lutris)
獺祭[dassai] arraying a number of reference books in order to compose poetry
ユーラシア川獺[yuurashiakawauso] European otter (Lutra lutra)

海獺[umiuso] sea lion
小爪川獺[kotsumekawauso] Asian small-clawed otter (Aonyx cinerea)
獺魚を祭る[kawausouowomatsuru] one of the 72 climates (from the 16th to the 20th of the first lunar month)