午 — Noon, Midday

Meaning

午 means noon or midday — the midpoint of the day, when morning ends and afternoon begins. At just four strokes, it's one of the simplest kanji in the language. You'll encounter it constantly: on clocks, train timetables, shop signs, and appointment reminders all across Japan.

The character traces back to the ancient Chinese system of the Twelve Earthly Branches (十二支, jūnishi), a cyclical timekeeping framework used across East Asia for over two millennia. In this system, 午 is the seventh branch, associated with the Horse (馬, uma). The Horse's hours span 11 AM to 1 PM — the midpoint of the day. That association stuck, and 午 eventually came to mean noon itself rather than merely a zodiac marker.

Visually, the character looks like a cross with an extra horizontal stroke at the top. One memorable interpretation: a sundial's gnomon at its shortest shadow, the moment when the sun stands directly overhead. Built on the radical 十 (ten), the shape has a clean, balanced look that suits a character representing the center of the day. Some scholars trace the pictographic origin to a pestle used in ancient agricultural work — reinforcing themes of midday labor and rest.

Japanese students learn 午 in second grade. Four strokes, one reading, a handful of essential compounds — that's the whole package.

Readings

On'yomi (音読み) — Chinese-derived readings

The on'yomi of 午 is ゴ (go), carried over from Middle Chinese pronunciation. This is the only reading you'll need in daily life — 午 almost always appears inside compound words, never written alone.

ゴ appears in the core vocabulary for telling time in Japanese:

午前ごぜん (gozen) — AM, the period before noon (literally "before noon")
午後ごご (gogo) — PM, the period after noon (literally "after noon")
正午しょうご (shōgo) — exactly noon, 12:00 PM (literally "correct noon")

Three words cover most of what 午 does in modern Japanese. Learn those and you're set.

Kun'yomi (訓読み) — Native Japanese readings

午 has no standard kun'yomi. This is unusual for a basic kanji, but it reflects how the character entered Japanese: as part of the Chinese timekeeping system, not as a native word. The Japanese word for horse is uma (うま), written with 馬 — a completely separate kanji.

For learners, this is a small gift: one reading, ゴ, is all you need to use this character fully.

Common Words & Compounds

午 appears in a compact but essential set of time expressions. Here are the most important ones, grouped by context:

Core Time Expressions

午前ごぜん (gozen) — AM; used in both formal and casual contexts for any time before noon
午後ごご (gogo) — PM; covers afternoon and evening, any time after 12:00
正午しょうご (shōgo) — exactly noon; precise and formal, common in news broadcasts and official schedules
午前中ごぜんちゅう (gozenchū) — sometime during the morning; less specific than a clock time, useful for plans and promises

Scheduled Time & Appointments

午前ごぜん9時じ (gozen kuji) — 9:00 AM; the standard pattern for morning clock times
午後ごご3時じ (gogo sanji) — 3:00 PM; common in scheduling, appointments, and business
午後ごご半はん (gogo han) — afternoon half; loosely refers to mid-to-late afternoon

Zodiac & Traditional Contexts

午年うまどし (umadoshi) — the Year of the Horse in the Chinese/Japanese zodiac
午うまの刻こく (uma no koku) — the Hour of the Horse in traditional Japanese timekeeping (11 AM–1 PM)
壬午じんご (jingo) — a specific year in the traditional 60-year cycle (e.g., 1882, 1942, 2002)

Example Sentences

今日きょうの午後ごご、図書館としょかんに行いきます。

Kyō no gogo, toshokan ni ikimasu.

I'll go to the library this afternoon.

会議かいぎは午前ごぜん10時じに始はじまります。

Kaigi wa gozen jūji ni hajimarimasu.

The meeting starts at 10 AM.

正午しょうごに一緒いっしょに昼食ちゅうしょくを食たべましょう。

Shōgo ni issho ni chūshoku wo tabemashō.

Let's have lunch together at noon.

午前中ごぜんちゅうはずっと勉強べんきょうしていました。

Gozenchū wa zutto benkyō shite imashita.

I was studying all morning long.

電車でんしゃは午後ごご2時じに出発しゅっぱつします。

Densha wa gogo niji ni shuppatsu shimasu.

The train departs at 2 PM.

店みせは午前ごぜん9時じから午後ごご8時じまで開あいています。

Mise wa gozen kuji kara gogo hachiji made aite imasu.

The store is open from 9 AM to 8 PM.

午後ごごになると、とても眠ねむくなります。

Gogo ni naru to, totemo nemuku narimasu.

When afternoon rolls around, I get very sleepy.

彼女かのじょは毎日まいにち正午しょうごにラジオを聞ききます。

Kanojo wa mainichi shōgo ni rajio wo kikimasu.

She listens to the radio every day at noon.

午前中ごぜんちゅうに仕事しごとを終おわらせたいです。

Gozenchū ni shigoto wo owarasetai desu.

I want to finish work before noon.

Related Kanji

Memory Tip

Picture 午 as a clock hand pointing straight up — frozen at 12 o'clock. The vertical stroke is the minute hand at its peak; the horizontal strokes mark the clock face. This image connects directly to how the character works: 午前 puts you before the hand reaches the top (morning), and 午後 puts you after it's passed (afternoon).

The Horse connection adds another layer. In ancient East Asia, noon was peak energy — the hottest, brightest hour of the day. 午 carries that midday intensity even now.