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Japanese Time Expressions: Days, Months, Hours & More

The complete reference for every time word you’ll need in Japanese.

Published April 9, 2026 · 7 min read

Scheduling a meeting? Talking about your daily routine? Buying train tickets? You need time expressions. Japanese has unique readings for many dates and times that don’t follow obvious patterns — this guide covers them all.

Days of the Week (曜日)

DayJapaneseReadingKanji Meaning
Monday月曜日げつようびMoon
Tuesday火曜日かようびFire
Wednesday水曜日すいようびWater
Thursday木曜日もくようびWood
Friday金曜日きんようびGold/Metal
Saturday土曜日どようびEarth
Sunday日曜日にちようびSun

Mnemonic Hack: The days follow the same elements as planets in many languages: Moon, Mars (fire), Mercury (water), Jupiter (wood), Venus (gold), Saturn (earth), Sun. Learn the kanji for these elements and you’ll never forget!

Months (月)

Japanese months are beautifully simple — just number + 月 (がつ):

MonthJapaneseMonthJapanese
January一月 (いちがつ)July七月 (しちがつ)
February二月 (にがつ)August八月 (はちがつ)
March三月 (さんがつ)September九月 (くがつ)
April四月 (しがつ)October十月 (じゅうがつ)
May五月 (ごがつ)November十一月 (じゅういちがつ)
June六月 (ろくがつ)December十二月 (じゅうにがつ)

Days of the Month (日)

This is where it gets tricky. The first 10 days use special native Japanese readings:

DateReadingDateReading
1日ついたち6日むいか
2日ふつか7日なのか
3日みっか8日ようか
4日よっか9日ここのか
5日いつか10日とおか

After the 10th, most dates use number + にち (e.g., 11日 = じゅういちにち). Exceptions: 14日 (じゅうよっか), 20日 (はつか), 24日 (にじゅうよっか).

Relative Time Words

PastJapaneseFutureJapanese
Day before yesterdayおとといDay after tomorrowあさって
YesterdayきのうTomorrowあした
Last week先週 (せんしゅう)Next week来週 (らいしゅう)
Last month先月 (せんげつ)Next month来月 (らいげつ)
Last year去年 (きょねん)Next year来年 (らいねん)

Drill Time Words Until They’re Automatic

Irregular readings like ついたち and はつか won’t stick from reading a chart once. You need spaced repetition. Add these to your Kanjijo flashcard deck and let the SRS algorithm schedule reviews at the perfect intervals — so you never forget but never waste time over-reviewing.

Memorize with Smart Flashcards

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