Meaning
The kanji 赤 is one of the first colors students encounter. While it primarily means red, it carries deep cultural weight in Japan, symbolizing everything from divinity and protection to vitality. Japanese children learn this character in the first grade. For JLPT students, it is an essential N4 kanji that appears frequently in both daily conversation and technical literature.
Its visual history is striking. The character is an ideograph traditionally representing a combination of 大 (big/person) and 火 (fire). This depicts a large, roaring fire emitting a bright red glow. This connection to heat explains why red represents purification in Shintoism. You will see this reflected in the bright red torii gates at shrines, which serve as barriers against evil spirits.
Written with 7 strokes, the kanji balances a modified top element over four distinct fire-like strokes. In modern Japan, red remains a powerful symbol of the sun on the national flag. It also marks significant life milestones, such as the red-and-white kohaku colors used during celebrations.
Readings
The character changes its reading based on whether it acts as a standalone adjective or forms part of a compound word.
On'yomi (音読み) — Chinese-derived readings
The primary on'yomi is セキ (seki). This reading appears in formal, scientific, or academic compounds known as jukugo. You will rarely use 'seki' on its own. A secondary reading, シャク (shaku), is less common and usually found in specialized metallurgical or historical terms.
Common on'yomi compounds include:
- 赤道 (sekidou) — Equator (the "red path")
- 赤十字 (sekijuuji) — Red Cross
- 赤外線 (sekigaisen) — Infrared rays
Kun'yomi (訓読み) — Native Japanese readings
The native readings are used in everyday speech. あか (aka) is the noun form. To describe an object, add the hiragana 'i' to form the adjective あか.い (akai). The character also functions as a verb: あか.らむ (akaramu) means to redden or flush naturally, while あか.らめる (akarameru) means to turn something red (like blushing on purpose or ripening).
Essential native words:
- 赤い (akai) — Red (adjective)
- 赤ちゃん (akachan) — Baby (literally "little red one," referring to a newborn's skin)
- 真っ赤 (makka) — Deep red or crimson
Common Words & Compounds
The kanji 赤 appears in various contexts ranging from finance to social relationships. Here are the most useful examples for your vocabulary.
People and Daily Life
- 赤ん坊 (akanbou) — An alternative, slightly more traditional word for baby.
- 赤の他人 (aka no tanin) — A complete stranger. In this context, "aka" emphasizes a total, "clear" lack of relationship.
- 赤ワイン (aka wain) — Red wine.
Finance and Business
- 赤字 (akaji) — Financial deficit or "in the red." This mirrors the English concept of using red ink for losses.
- 赤てん (akaten) — A failing grade. Teachers often use red ink to mark failed tests.
Expressions and Descriptions
- 赤面する (sekimen suru) — To blush from shame or embarrassment.
- 赤恥 (akahaji) — Public disgrace or a humiliating "red-faced" moment.
- 赤銅 (shakudou) — A copper-gold alloy known for its dark red-purple patina.
Example Sentences
赤いリンゴを一つ買いました。
Akai ringo wo hitotsu kaimashita.
I bought one red apple.
あの赤ちゃんはとてもかわいいですね。
Ano akachan wa totemo kawaii desu ne.
That baby is very cute, isn't it?
恥ずかしくて、顔が赤くなりました。
Hazukashikute, kao ga akaku narimashita.
I was embarrassed, and my face turned red.
信号が赤のときは、止まらなければなりません。
Shingou ga aka no toki wa, tomaranakereba narimasen.
When the light is red, you must stop.
彼の会社は、ずっと赤字が続いている。
Kare no kaisha wa, zutto akaji ga tsuzuite iru.
His company has been in the red for a long time.
夕日で空が真っ赤に染まった。
Yuuhi de sora ga makka ni somatta.
The setting sun dyed the sky a deep crimson.
Related Kanji
- 暑 — Hot (Weather), Heat (Kanji N4)
- 色 — Color, Expression, Appearance (Kanji N4)
- 集 — Gather, Collect, Assemble (Kanji N4)
- 夜 — Night, Evening (Kanji N4)
- 夕 — Evening, Dusk (Kanji N4)
- 黒 — Black, Dark (Kanji N4)
Memory Tip
Visualize the components: a large person (大) standing over a fire (火). The person is standing so close to the bonfire that their skin is glowing red from the heat. Look at the four dots at the bottom; they look like sparks or embers jumping out of the flames. Whenever you see those "fire legs" at the base of a kanji, think of the heat turning everything red.