9 in Japanese
九
Updated June 2026
9 in Japanese is 九, written きゅう in hiragana and read kyū (also ku). Kyu or ku: the milder unlucky
NUMERAL
9
KANJI
九
HIRAGANA
きゅう
or く
ROMAJI
kyū
or ku
Counter-attached forms
How 9 attaches to common counters. Each links to the per-counter deep-dive.
Cultural context
Kuphobia (milder): the reading ku sounds like 苦 (suffering / pain). The number 9 is less universally avoided than 4 but is still treated with care in some hospitals and gift contexts. Kyu is the safer reading and dominates in counting. Source: Wikipedia "Japanese superstitions" and NHK Pronunciation Dictionary on ku vs kyu register.
Daiji formal form (for cheques and contracts)
Real sentence examples
九時から会議が始まります (ku-ji kara kaigi ga hajimarimasu): the meeting starts from 9 o’clock.
私たちのチームは九人です (watashi-tachi no chiimu wa kyū-nin desu): our team is nine people.
Pronunciation and morphology notes
Nine has two readings. Kyu is the default in counting and most counter attachments. Ku survives in time (ku-ji = 9 o’clock), months (ku-gatsu = September), and a few set phrases (ku-bu-ku-rin = “a 99% chance” literally “9 portions out of 9 chains”). Phone numbers always use kyu to avoid mishearing ku as roku (6) or other digits. The daiji form 玖 is rare but real.
Frequently asked questions
How do you write 9 in Japanese?
9 is written 九 in kanji and きゅう in hiragana. In romaji (modified Hepburn) it is kyū, also read ku in some contexts.
What is 9 in hiragana?
9 in hiragana is きゅう (or く). Hiragana spells out the reading kyū phonetically; the kanji form is 九.
What is the formal (daiji) form of 9?
The daiji form of 9 is 玖. Daiji are elaborate kanji used on cheques, contracts, and official documents to stop anyone altering the simpler 九.
Related numbers
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