Japanese Mora and Rhythm: Why Japanese Timing Is Different From English

2026年4月23日

Japanese is a mora-timed language — every mora takes the same amount of time. English is stress-timed, where stressed syllables are longer and unstressed ones are shorter. This difference is why Japanese sounds choppy or sing-song to English ears, and why English speakers sound off-beat to Japanese ears.

Concept	Japanese	English
Rhythm unit	Mora (拍)	Syllable + stress
Timing	Every mora = equal duration	Stressed syllables longer
Number of morae	き=1, きょ=1, きょう=2	Syllables vary in duration
Long vowel	Counts as 2 morae	Treated as 1 syllable
っ / ん	Each = 1 mora	No equivalent concept

TOC

What Is a Mora?

Yuka

日本語は「拍」で刻む。「きょうと」は4拍！き・よ・う・と！
(Japanese is timed by mora. 「きょうと」= 4 morae: き・よ・う・と!)

Rei

英語は音節で刻む。「Tokyo」は2音節でTo-kyo。感じ方が違うね。
(English uses syllables. ‘Tokyo’ = 2 syllables: To-kyo. Very different feel.)

A mora is the basic rhythmic unit. In Japanese, each hiragana character (except combination characters like きょ) is one mora.

Word	Hiragana	Mora count	Breakdown
Tokyo	とうきょう	4	と・う・き・ょ・う — wait, きょ=1 mora, but う extends it. See below.
Osaka	おおさか	4	お・お・さ・か
Ramen	ラーメン	4	ラ・ー・メ・ン (ー and ン each = 1 mora)
Sapporo	さっぽろ	4	さ・っ・ぽ・ろ

Note on きょ: Combined characters (きょ, しゃ, etc.) count as 1 mora, not 2. The small や/ゆ/よ does not add an extra beat.

Stress-Timed vs Mora-Timed: Hear the Difference

Yuka

英語は「EL-e-phant」— 最初の音節が長い。日本語は「ぞ・う」— 均等。
(English: EL-e-phant — first syllable long. Japanese: ぞ・う — equal timing.)

English speakers often stress the first syllable of Japanese words. To fix this, imagine tapping a metronome and fitting each mora to one tap:

WRONG: SA-pporo (stress on SA)
RIGHT: さ・っ・ぽ・ろ (equal taps: 1-2-3-4)

Special Morae: Long Vowels, っ, and ん

Special mora	How to count	Example
Long vowel (ー/あ+あ)	2 morae total (1 short + 1 extension)	ラーメン = ラ(1)ー(2)メ(3)ン(4)
っ (sokuon)	1 mora of silence/hold	きって = き(1)っ(2)て(3)
ん (n-mora)	1 full mora	おんがく = お(1)ん(2)が(3)く(4)