一

Common noun

one meaning; one thought

Adverb (fukushi)

wholeheartedly; single-mindedly; devotedly

Nouns which may take the genitive case particle 'no'; Adjectival nouns or quasi-adjectives (keiyodoshi); Computing

unique

one tree

one (straw) bagful

one evening; some evenings

doing a job; riding and sweating up a horse

above all else

knowing only one thing (and repeating it often); saying the only thing one knows (at every opportunity); repeating the only thing one knows

Medicine

identical (of twins); monozygotic; unioval; uniovular

an item

every other day

overconcentration (esp. of population, cultural and political institutions, etc. in Tokyo); heavy concentration

Military

private first class

independence

sleeping alone

solitary Japanese cedar

uniaxial

(a) passing acquaintance

to make a name for oneself; to achieve success

one tablet; one pill

tray; salver

Pre-noun adjectival (rentaishi)

a size smaller

(short) run; drive; ride; spin

(possession of) one feudal domain and one castle; being independent (acting without compromise or assistance)

Historical term

establishing only one castle in each feudal domain (edict issued by the shogunate in 1615)

short joke; quick one-liner; one-shot joke

Computing

simultaneous transmission; sending to multiple recipients; sending a group message