瀬 - rapids, current, torrent

strait; channel

swift current; rapids

shallow river; shallows

shoal; shallows; sand bar; ford

brink; verge; critical moment; crucial moment

shallows; shoal

earthenware; porcelain; china; pottery; crockery

chance; opportunity; lucky break

tasselled wobbegong (Eucrossorhinus dasypogon)

Japanese foxtail (Alopecurus japonicus)

many torrents; many rapids

Watase line (biogeographic boundary between the Palearctic and Oriental realms)