N5 - 一昨日おととい
day before yesterday
N5 - 一昨年おととし
year before last
N5 - 一日ついたち
first day of month
N4 - 一生懸命いっしょうけんめい
with utmost effort
N3 - 一番いちばん
best, first, number one
N3 - 一家いっか
a house, a home, a family, a household
N3 - 一種いっしゅ
a species, a kind, a variety
N3 - 一瞬いっしゅん
a moment, an instant
N3 - 一生いっしょう
whole life, a lifetime, all through life
N3 - 一層いっそう
much more, still more, all the more
N3 - 一体いったい
(1) one object, one body, (2) what on earth?, really?, (3) generally
N3 - 一致いっち
(1) coincidence, agreement, (2) conformity
N3 - 一般いっぱん
general, liberal, universal, ordinary, average
N3 - 一方いっぽう
(1) on the other hand, (2) meanwhile, (3) only, simple, in turn
N3 - 同一どういつ
identity, sameness, similarity
N3 - 一人一人ひとりひとり
one by one, each, one at a time
N3 - 万一まんいち
by some chance, by some possibility, if by any chance, 10E4:1 odds
N3 - 唯一ゆいいつ
only, sole, unique
N2 - 一応いちおう
once, tentatively, in outline, for the time being
N2 - 一段といちだんと
greater, more, further, still more
N2 - 一流いちりゅう
first class, top grade, foremost, top-notch
N2 - 一昨日いっさくじつ
day before yesterday
N2 - 一昨年いっさくねん
year before last
N2 - 一斉いっせい
simultaneous, all at once
N2 - 一旦いったん
once, for a moment, one morning, temporarily
N2 - 一定いってい
fixed, settled, definite
N2 - 一昨昨日さきおととい
two days before yesterday
N2 - 統一とういつ
unity, consolidation, uniformity
N2 - 一通りひととおり
ordinary, usual, in general, briefly
N1 - 一々いちいち
one by one, separately
N1 - 一概にいちがいに
unconditionally, as a rule
N1 - 一見いちげん
unfamiliar, never before met
N1 - 一定いちじょう
fixed, settled, definite, uniform, regularized, defined, standardized, certain, prescribed
N1 - 一同いちどう
all present, all concerned, all of us
N1 - 一部いちぶ
1. one copy e.g. of a document, 2. a part, partly, some
N1 - 一面いちめん
one side, one phase, front page, the other hand, the whole surface
N1 - 一目いちもく
a glance, a look, a glimpse
N1 - 一様いちよう
uniformity, evenness, similarity, equality, impartiality
N1 - 一律いちりつ
evenness, uniformity, monotony, equality
N1 - 一連いちれん
a series, a chain, a ream (of paper)
N1 - 一括いっかつ
all together, batch, one lump, one bundle, summing up
N1 - 一気いっき
drink!(said repeatedly as a party cheer)
N1 - 一挙にいっきょに
at a stroke, with a single swoop
N1 - 一切いっさい
all, everything, without exception, the whole, entirely, absolutely
N1 - 一心いっしん
one mind, wholeheartedness, the whole heart
N1 - 一帯いったい
a region, a zone, the whole place
N1 - 一変いっぺん
complete change, about-face
N1 - 単一たんいつ
single, simple, sole, individual, unitory
N1 - 第一だいいち
first, foremost, # 1
N1 - 一息ひといき
puffy, a breath, a pause, an effort
N1 - 一頃ひところ
once, some time ago
N1 - 一筋ひとすじ
a line, earnestly, blindly, straightforwardly