(idiomatic) from A to Z

six

The SI derived unit of volume: a (UK) cubic metre, (US) cubic meter.

the metric system

五日 (itsuka, go-nichi, “fifth (5th) day”) / 十日 (tōka, jū-nichi, “tenth (10th) day”) / 十五日 (jūgo-nichi, “fifteenth (15th) day”) / 二十日 (hatsuka, nijū-nichi, “twentieth (20th) day”)

fifty days / Short for 五十日の祝 (ika no iwai): a Heian-period celebration on the 50th day after a child's birth / Short for 五十日の餅 (ika no mochii): mochi fed to the child during ika no iwai

a person who sells fish; also, such a store

a person who sells fish; also, such a store

a pentadecagon

twenty-five; 25