a privately-owned ricefield, especially one under the historical 律令 (Ritsuryō) system

personal grudge

Kyūjitai form of 私鉄 (“private railway”)

Rome wasn't built in a day

(Shinto) the gods of calamity or misfortune

a crescent moon on the third day of a lunar month, especially on the eighth lunar month / (by extension) Short for 三日月形 (mikazuki-gata): a crescent moon in general

twenty years old

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

brush made with fetal hair

to each his own; different strokes for different folks; there's no accounting for taste