once (in the indeterminate past)

the past, old times / ancient

olden days; former

a journey; travel / (archaic) a temporary time spent in a place

trip / travel

in ancient China, a military unit of 500 soldiers / one of the I Ching hexagrams: sojourning (I Ching hexagram interpretation on Wikipedia here)

a trip, a journey, travel

to travel, to go on a journey or trip

just as in the old days, just as it used to be

(archaic, colloquial) a nickname of Ariwara no Narihira, Heian-period waka poet