lifeboat; friend in need; helping hand; timely help
boat to transport mud; (fictional) boat made of (dried) mud
bathtub; boat with a bathtub rented to customers (Edo period)
fishing boat; boat-shaped hanging flower vase
(arch.) fast-moving rowboat; type of fast military ship
long, thin, roofless small boat (used as a river taxi during the Edo period)
straw boat for one's ancestral spirits to sail in
wooden transport ship used on Lake Biwa; vessel made from logs, e.g. large dugout canoe
being fast asleep (and totally unaware of what is going on around one); know-it-all manner
plank raft; display stand for seafood (Edo period)
unidentified craft said to have washed ashore in Ibaraki Prefecture during the Edo period (sometimes alleged to have been a UFO)
ox-palate nerite (Nerita albicilla); blotched nerite
Bostrycapulus gravispinosus (species of spiny slipper snail)