Used to indicate that something is the most or best in a certain context. Often appears in phrases like 一の～ or 一に～. Somewhat literary or emphatic.
Health is the most important thing.
He got the best grades in the class.
agreement; correspondence; match; coincidence · unity; cooperation; union
merits and demerits; advantages and disadvantages; good points and shortcomings
one leaf (of a Japanese-style book) · one block of tofu; one serving (restaurant) · one long narrow thing (gun, scissors, spade, etc.) · one chō (approx. 109.09 m) · one game; one task · well then; right
one pair (set) of clothes
once; one morning; temporarily; short period
lining out to first base
first place in a race; first to arrive · one suit of clothes; one item of clothing · putting on formal clothes; wearing · one move in go
a point; a degree; a little
listening once; hearing once
Icchū-bushi; type of jōruri
whole day and night; 24 hours
the three unities (time, place, and action)
tension and relaxation; alternating strictness and leniency
Standard kanji spelling for this adverb.
Alternate kanji form; less common than 一.
Derived from the kanji 一 (one), used adverbially to mean 'first' or 'most'. The reading いっち is a variant of いち, possibly influenced by classical or dialectal usage.