(n) (one's) sleeping hours
hours of sleep
(n) time limit
(n) (comp) settling time
(n) one's youth
one's youthful days (years)
the flower of one's youth
the springtime of one's life
(n) (one's) youth
one's younger days
(n) Stone Age
(n) (comp) connect time
(n,adj-no) prehistoric era
prehistoric times
prehistory
(n) (1) Warring States period (of Japanese history, approx. 1467-1568 CE)
(2) Warring States period (of Chinese history, 403-221 BCE)
(3) era of vicious competition
(n) war loan
(n) wartime industry
(n) wartime regime
war footing
(n) war-risk insurance
war insurance
(n) times of war
(n) prehistoric period
(adj-na) premodern
old-fashioned
outmoded
antiquated
(n) golden age
(n) run time
(n) winter (season)
slack or off season
(n) immediate kokoku appeal
(n) immediate cease-fire
(n) spot payment
(n) Ashikaga period (i.e. the Muromachi period, 1333-1573 CE)
(n) biological clock
(n) waiting time
latency
standby time (e.g. cellular phones)
(n) duration of a flight
(n) Taisho period (1912-1926 CE)
(n) Yamato period (300-550 CE)
(n) local time
(n) geological age
prehistory
