one

いっしょ

together

いち

one

いちにち

one day (duration)

いちばん

best (most), first, number one

おととい

the day before yesterday

ひとつ

one thing

ひとつき

one month

ひとり

one person

いっしょうけんめい

very hard (as in "to work hard"), with utmost effort

いちど

once, one time

いっぱい

full, to the utmost

いちじ

for a time, temporarily

いちどに

all at once

いっか

family, clan

いっしゅ

a species, a kind, a variety

いっしゅん

a moment, an instant

いっしょう

throughout (one's) life

いっそう

much more, still more

いったい

one object; body; what on earth?; generally

いっち

agreement; conformity

いっぱん

general, average

いっぽう

on the other hand; meanwhile

まんいち

by some chance, if by any chance

ゆいいつ

only, sole, unique

いったい

a region, the whole place

どういつ

identity, sameness, similarity

ひとこと

one word

ひとりひとり

one by one, each

いちおう

tentatively, for the time being

いちだんと

by far, greater

いちりゅう

first class, leading

いっさくねん

year before last

いっせい

simultaneous, all at once

いったん

once, for a moment

いってい

fixed, settled, regular

さきおととい

two days before yesterday, three days ago

とういつ

unity, consolidation, uniformity

ひと～

one ~

ひととおり

general, briefly

ひとやすみ

a rest

いちがいに

unconditionally, necessarily

いちどう

all present, all concerned, all of us

いちぶぶん

a part, a portion

いちべつ

parting

いちめん

one side, the other hand

いちもく

a glance, a look, a glimpse

いちよう

uniform, similar, equal

いちりつ

even, uniform, equal

いちれん

a series, a chain, a ream (of paper)

いっかつ

all together, batch

いっき

at one push, in one gulp

いっきょに

at a stroke, with a single swoop

いっけん

a look, a glimpse, glance; first meeting

いっさい

without exception, the whole

いっしん

one mind, with rapt attention

いっぺん

complete change

たんいつ

single, simple, sole

ひといき

a breath, a pause, an effort

ひところ

once, some time ago

ひとすじ

a line, earnestly, blindly, straightforwardly