一寸 (one sun (approx. 3.03 cm))

一緒 (together)

一度 (once,one time,on one occasion)

一人 (one person)

一番 (number one,first,first place)

一 (one)

一二 (the first and second,a few)

一応 (more or less,though not quite satisfactorily,after a fashion,pretty much,roughly,so far as it goes)

一体 (...the heck (e.g. "what the heck?"),...in the world (e.g. "why in the world?"),...on earth (e.g. "who on earth?"))

一目 (glance,look,glimpse)

一条 (one long straight object,streak,beam,ray (of light),wisp (of smoke))

一般 (general,universal)

一同 (all present,all concerned,all of us)

一丁 (one sheet,one page,one leaf)

一日 (one day)

一時 (moment,a (short) time,a while)

一口 (mouthful,morsel,bite)

一重 (one layer,single,onefold)

一万 (10,000,ten thousand)

一理 ((a) principle,(a) reason,(a) point,some truth)

一昨 (one previous)

一尉 (captain (JSDF))

一見 (look,glimpse,glance)

一旦 (once)

一人暮らし (a single life,a solitary life,living alone)

十一 (11,eleven)

一人っ子 ((an) only child)

一家 (a family,a household,a home,one's family,whole family)

一休み ((short) rest,breather,break)

一句 (phrase (verse, line))

一線 (line)

一撃 (blow,hit,poke)

一種 (species,kind,variety)

一先ず (for the present,once,in outline)

一息 (one breath,pause,rest)

一族 (family,relatives,dependents)

一夜 (one night,all night,overnight,one evening)

一昨日 (day before yesterday)

一瞬 (instant,moment,for an instant)

一歩 ((a) step)

一杯 (amount necessary to fill a container (e.g. cupful, spoonful, etc.),drink (usu. alcoholic))