(historical, archaic) an era that began on 9 November 1681 (twenty-ninth day of the ninth month according to the Japanese calendar) and ended on 5 April 1684 (twenty-first day of the second month)

(mahjong) heavenly hand: a winning hand drawn by the dealer at the beginning of the game, worth 役満 (yakuman, “limit”)

(historical) an era that began on 9 November 1681 (twenty-ninth day of the ninth month according to the Japanese calendar) and ended on 5 April 1684 (twenty-first day of the second month)

time for doing something / period of time / season

important, significant

importance, consequence, significance

age, era, period (of time) / the times, spirit of the age / antiquity / a time in one's life, one's days (in college etc.)

history / the study of history

the Mesolithic

中々: very, quite, considerably, rather, by no means (with negative verb)