expression, adverb, noun which may take the genitive case particle 'no'
once; on one occasion; at one time
Refers to an unspecified past time or a particular occasion. Often used at the beginning of a story or anecdote.
Once, I got lost in the forest.
He recalled an event from one time.
Standard kanji-kana spelling.
Literary or formal variant using the ateji 或る for ある.
Combination of the prenominal adnominal ある (a certain) and 時 (time).