九 — Nine | JP Notes

Meaning

The kanji 九 means nine. Japanese first-graders learn it early, and JLPT N5 learners encounter it almost immediately — at just two strokes, it is one of the easiest characters to write and one of the most useful to know.

The shape traces back to oracle bone script, where it resembled a bent arm or curled limb. Over centuries it simplified into today's clean form. Nine has a dual personality in Japanese culture: キュウ echoes 久 (kyuu, "long-lasting"), lending the number an auspicious feel in gifts and ceremonies. At the same time, ク sounds like 苦 (ku, "suffering"), so nine can carry an unlucky nuance depending on context — a subtlety worth knowing.

Readings

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

キュウ (kyuu) is the main on'yomi, used in most compound numbers.

九十きゅうじゅう (kyuujuu) — ninety
九百きゅうひゃく (kyuuhyaku) — nine hundred
九千きゅうせん (kyuusen) — nine thousand
九州きゅうしゅう (Kyuushuu) — Kyushu

ク (ku) is the shorter reading, common in time expressions and calendar terms.

九月くがつ (kugatsu) — September
九時くじ (kuji) — nine o'clock
九分くぶ (kubu) — nine-tenths

Kun'yomi (訓読み) — Native Japanese readings

ここのつ (kokonotsu) is the native word for "nine things," part of the classical counting series (hitotsu, futatsu, mittsu…).

九つここのつ (kokonotsu) — nine (things)
九日ここのか (kokonoka) — the ninth day; nine days

Common Words & Compounds

Numbers and Counting

九きゅう (kyuu) — nine
九つここのつ (kokonotsu) — nine things (native counter)
九十きゅうじゅう (kyuujuu) — ninety
九百きゅうひゃく (kyuuhyaku) — nine hundred
九千きゅうせん (kyuusen) — nine thousand

Time and Calendar

九月くがつ (kugatsu) — September
九時くじ (kuji) — nine o'clock
九日ここのか (kokonoka) — ninth day of the month; nine days
九年きゅうねん (kyuunen) — nine years; the ninth year

Geography

九州きゅうしゅう (Kyuushuu) — Kyushu, one of Japan's four main islands; the name means "nine provinces"

Set Expressions

九分九厘くぶくりん (kubu kurin) — almost certainly; 99% sure
九死に一生くしにいっしょう (kushi ni isshou) — a narrow escape from death; one chance in nine of surviving

Example Sentences

九きゅうたす一いちは十じゅうです。

Kyuu tasu ichi wa juu desu.

Nine plus one is ten.

今日きょうは九月くがつ九日ここのかです。

Kyou wa kugatsu kokonoka desu.

Today is September 9th.

授業じゅぎょうは九時くじに始はじまります。

Jugyou wa kuji ni hajimarimasu.

Class starts at nine.

九州きゅうしゅうに行いったことがありますか。

Kyuushuu ni itta koto ga arimasu ka.

Have you ever been to Kyushu?

りんごを九ここのつ買かいました。

Ringo wo kokonotsu kaimashita.

I bought nine apples.

この問題もんだいは九問きゅうもんあります。

Kono mondai wa kyuu mon arimasu.

There are nine questions in this set.

彼女かのじょは九十きゅうじゅう歳さいまで生いきました。

Kanojo wa kyuujuu sai made ikimashita.

She lived to ninety.

九死くしに一生いっしょうを得えた経験けいけんがあります。

Kushi ni isshou wo eta keiken ga arimasu.

I once had a brush with death.

試験しけんの結果けっかは九分九厘くぶくりんだいじょうぶだと思おもいます。

Shiken no kekka wa kubu kurin daijoubu da to omoimasu.

I'm almost certain the exam results will be fine.

Related Kanji

二 — Two (Kanji N5)
百 — Hundred (Kanji N5)
中 — Middle, Inside (Kanji N5)
四 — Four (Kanji N5)
千 — Thousand (Kanji N5)
一 — One (Kanji N5)

Memory Tip

Picture a person raising nine fingers with one elbow bent outward — that curved hook is exactly the shape of 九. For the sound, キュウ (kyuu) rhymes with "cue": you get your cue at count nine. And if you ever forget which island is Kyushu, remember: 九州きゅうしゅう literally means "nine provinces" — the number is baked right into the name.

九 — Nine