(rare, obsolete) (all senses appear to be identical as for hitohi above)

(literary) one day, 24 hours / (literary) the daytime, the period from dawn until dusk / (literary) (figuratively) a short period of time

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

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

inside

the Second Sino-Japanese War

all night

the eighth day of the month / eight days

the ninth day of the month / nine days

the seventh day of the month / seven days