赤い
あかい
akai
= red
Akai is the color that commands attention in Japan — from shrine torii gates to stop signs, red carries cultural weight beyond mere pigment.
Akai (赤い, red) is the adjective form for the color red. In Japanese, colors are adjectives (赤い, 青い, 黒い), not nouns. The standalone noun aka (赤) exists but is formal; in everyday speech, akai is how you describe something as red. Shades matter: aka can range from crimson to scarlet to the red of a shrine torii gate — all called akai in Japanese, though context clarifies the exact shade.
Remember that akai is an adjective in Japanese, not a noun — you say akai iro (red color) or akai youchuu (red signal), not just aka in casual speech. The word akaku naru (to become red) is common — blushing, ripening fruit, sunset skies. Akai can also mean embarrassed (humiliated) in older Japanese, so context matters.
EXAMPLE 1
その花は赤い色をしている。
Sono hana wa akai iro wo shite iru.
That flower is red in color.
EXAMPLE 2
信号が赤い場合は、止まらなければならない。
Shingou ga akai baai wa, tomaranakerebanaranai.
When the traffic light is red, you must stop.
EXAMPLE 3
その屋根は赤い瓦でできている。
Sono yane wa akai kawara de dekite iru.
That roof is made of red tiles.
Akai holds deep cultural significance in Japan. Shrine torii gates are painted bright akai, symbolizing sacred space boundaries. Red is prosperity and protection in Shinto tradition. Red envelopes (akai fukuro) contain money for celebrations, and red threads symbolize fated connection between people.
In daily life, children’s akai boushi (red hat) on school uniforms mark them as schoolgoers; emergency vehicles are akai to stand out. The color commands attention and respect in Japanese visual culture.
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