赤

red line

Historical term; Abbreviation

red-light district (marked by a red line on police maps)

non-legal public road (denoted by a red line on cadastral maps; sometimes no longer physically existing)

Historical term

Red Army (Soviet Union, 1918-1946); Workers' and Peasants' Red Army

Abbreviation

Japanese Red Army; JRA

Medicine

dysentery

red flag

Red Flag (Communist Party newspaper)

red cap

(railway) porter; redcap

Red Cross

red light (esp. on emergency vehicles)

stark naked; nude; bare

unvarnished (e.g. truth); plain (e.g. fact); frank; candid; outspoken

troops outfitted with red armor (Sengoku and Edo periods)

Formal or literary term

sincerity; true heart; devotion

red dragon

Rare term

earthworm

pulp fiction; dime novel

Colloquial

akahon; university entrance exam workbook (published by Kyōgakusha)

storybook (with red cover, Edo period)

Red Guide (Michelin)

draft papers; call-up notice

Orig. meaning

red paper

dark red

chogori; jeogori; short jacket traditionally worn by Koreans

red beard; person with a red beard

Derogatory

Westerner

Word usually written using kana alone

Ryukyu robin (Erithacus komadori)

extreme poverty

Quercus gilva (species of oak)

red nose

red ant

red meat; reddish meat

the Red Peril

yak hair dyed red; red hair

frizzled fake hair; curly fake hair

red cloud

comet