月 — Month, Moon

Meaning

The kanji 月, pronounced tsuki, getsu, or gatsu, is a foundational character in Japanese. You'll encounter it frequently. Its main meanings are "moon" and "month," a dual concept rooted in observing nature's rhythms. Historically, the passage of months was tied to the moon's phases. For beginners studying Japanese at the JLPT N5 level, understanding 月 is essential because it underpins many time expressions and celestial references.

The kanji 月 began as a pictograph, a visual representation. It depicted a crescent moon, elegantly curving as it illuminated the night sky. Over time, this ancient drawing evolved into the more stylized form used today. Yet, you can still trace the original image in its four strokes: the two horizontal lines inside suggest the moon's light or subtle features, while the outer curved strokes form its distinctive shape, much like a sliver of the moon.

The connection to "month" naturally stemmed from the lunar calendar, where each new moon or cycle signaled the start of a new month. This association is common across many languages and cultures, showcasing how humanity has universally used celestial observations for timekeeping. The kanji's simple, elegant form, combined with its strong ties to both the natural world and human time constructs, makes 月 a crucial character for learners.

This kanji is straightforward to write, with just 4 strokes, making it easy for beginners to master. It's also a Grade 1 kanji, taught in the first year of elementary school in Japan. This early introduction highlights its fundamental role in the Japanese writing system, appearing in countless everyday words and phrases. Grasping 月 early provides a strong foundation for learning more complex kanji and vocabulary.

Readings

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

On'yomi readings come from ancient Chinese pronunciations. They're typically used when kanji combine with others to form compound words (熟語 - jukugo). For 月, the main On'yomi are ゲツ (GETSU) and ガツ (GATSU), often appearing in contexts related to time and days.

ゲツ (GETSU): You'll commonly find this reading in words for days of the week or periods of time. It's also used when 月 is the final component of a compound word, indicating a monthly duration or payment. This reading frequently appears in terms that denote recurring monthly events or structures.

月曜日げつようび (getsuyoubi) — Monday. "月曜日は仕事が忙しいです。" (Getsuyoubi wa shigoto ga isogashii desu.) — Mondays are busy with work.
今月こんげつ (kongetsu) — This month. "今月は旅行に行く予定です。" (Kongetsu wa ryokou ni iku yotei desu.) — I'm planning a trip this month.
先月せんげつ (sengetsu) — Last month. "先月、新しい本を買いました。" (Sengetsu, atarashii hon o kaimashita.) — I bought a new book last month.
月給げっきゅう (gekkyuu) — Monthly salary. "彼は高い月給をもらっています。" (Kare wa takai gekkyuu o moratteimasu.) — He receives a high monthly salary.

ガツ (GATSU): This reading is almost exclusively used for specific months of the year, usually preceded by a number. It functions as a counter for months, crucial for expressing dates in Japanese.

一月いちがつ (ichigatsu) — January. "一月はとても寒いです。" (Ichigatsu wa totemo samui desu.) — January is very cold.
二月にがつ (nigatsu) — February. "二月はバレンタインデーがあります。" (Nigatsu wa Barentain Dee ga arimasu.) — February has Valentine's Day.
三月さんがつ (sangatsu) — March. "三月は卒業の季節です。" (Sangatsu wa sotsugyou no kisetsu desu.) — March is graduation season.
何月なんがつ (nangatsu) — What month? "あなたの誕生日は何月ですか？" (Anata no tanjoubi wa nangatsu desu ka?) — What month is your birthday?

Kun'yomi (訓読み) — Native Japanese readings

Kun'yomi readings are native Japanese pronunciations. They're often used when a kanji stands alone or combines with hiragana endings (okurigana). For 月, the primary Kun'yomi is つき (tsuki).

つき (tsuki): This reading directly refers to "the moon" as a celestial body, often bringing to mind poetic or natural imagery. It can also mean "a month" in a more general sense, though the On'yomi is more common for specific calendar months. This reading connects to the kanji's pictographic origin.

月つき (tsuki) — Moon. "今夜はきれいな月が出ています。" (Konya wa kirei na tsuki ga deteimasu.) — A beautiful moon is out tonight.
満月まんげつ (mangetsu) — Full moon. "満月はとても明るいです。" (Mangetsu wa totemo akarui desu.) — The full moon is very bright.
三日月みかづき (mikazuki) — Crescent moon. "空に細い三日月が見えます。" (Sora ni hosoi mikazuki ga miemasu.) — A thin crescent moon is visible in the sky.
月の光つきのひかり (tsuki no hikari) — Moonlight. "月の光が窓から差し込みます。" (Tsuki no hikari ga mado kara sashikomimasu.) — Moonlight streams in through the window.
月見つきみ (tsukimi) — Moon viewing. "秋には月見のイベントがあります。" (Aki ni wa tsukimi no ibento ga arimasu.) — There are moon-viewing events in autumn.

Common Words & Compounds

The versatility of 月 allows it to form many compound words, vital for everyday Japanese communication. These compounds often relate to time, celestial observations, or monthly occurrences. Learning them will significantly expand your vocabulary and comprehension. Here's a selection of important vocabulary, organized by theme for easier learning:

Time & Calendar Related

今月こんげつ (kongetsu) — This month.
来月らいげつ (raigetsu) — Next month.
先月せんげつ (sengetsu) — Last month.
毎月まいつき (maitsuki) — Every month.
月曜日げつようび (getsuyoubi) — Monday.
何ヶ月なんかげつ (nankagetsu) — How many months? (used for duration)
ヶ月かげつ (kagetsu) — Counter for months. (e.g., 三ヶ月さんかげつ - three months)

Moon & Celestial Related

満月まんげつ (mangetsu) — Full moon.
三日月みかづき (mikazuki) — Crescent moon.
月食げっしょく (gesshoku) — Lunar eclipse.
月明かりつきあかり (tsukiakari) — Moonlight.
月面げつめん (getsumen) — Lunar surface.

Other Common Words

月給げっきゅう (gekkyuu) — Monthly salary.
月並みつきなみ (tsukinami) — Commonplace, ordinary, conventional.
月日つきひ (tsukihi) — Time, days and months (often in the sense of time passing).

Example Sentences

今日は月曜日げつようびです。

Kyou wa getsuyoubi desu.

Today is Monday.

月つきが空そらに見みえます。

Tsuki ga sora ni miemasu.

The moon can be seen in the sky.

私わたしの誕生日たんじょうびは九月くがつです。

Watashi no tanjoubi wa kugatsu desu.

My birthday is in September.

満月まんげつがとてもきれいです。

Mangetsu ga totemo kirei desu.

The full moon is very beautiful.

来月らいげつ、日本にほんへ旅行りょこうに行いく予定よていです。

Raigetsu, Nihon e ryokou ni iku yotei desu.

I plan to go on a trip to Japan next month.

毎月まいつき、この本ほんを読よみます。

Maitsuki, kono hon o yomimasu.

I read this book every month.

今月こんげつの目標もくひょうは、日本語にほんごを毎日勉強まいにちべんきょうすることです。

Kongetsu no mokuhyou wa, Nihongo o mainichi benkyou suru koto desu.

This month's goal is to study Japanese every day.

夜空よぞらには星ほしと月つきが美うつくしく輝かがやいています。

Yozora ni wa hoshi to tsuki ga utsukushiku kagayaiteimasu.

Stars and the moon are shining beautifully in the night sky.

彼かれは三ヶ月さんかげつ、海外かいがいに行いっていました。

Kare wa sankagetsu, kaigai ni itteimashita.

He went abroad for three months.

Related Kanji

Memory Tip

To effectively remember the kanji 月, visualize it as a serene crescent moon. The two short horizontal strokes within the larger curved shape can be imagined as subtle details or craters on the moon's surface, while the overall outline directly mimics the elegant curve of a moon shining in the night sky. Another useful mnemonic is to connect it to the concept of a "month," which cycles through its phases much like the moon. Picture a calendar page where the dominant image is a moon, symbolizing the passage of time. By consistently associating the visual form of 月 with either the celestial body or a unit of time on a calendar, you will create a strong mental link that helps solidify its meaning and structure in your long-term memory.