門 — Gate, Entrance, & Specialty

Meaning

At first glance, 門 looks exactly like what it represents: a pair of grand, swinging doors. While it literally refers to physical entrances at temples or schools, its meaning extends into the abstract. It often signifies an 'entry' into a specific field of knowledge. For example, in words like 専門 (specialty) or 入門 (introduction), the 'gate' acts as a symbolic barrier. One must pass through it to gain expertise or join a particular school of thought.

Etymologically, 門 is a classic pictograph of a traditional double gate. Unlike the kanji 戸 (to), which depicts a single-leaf door, 門 shows the symmetry of a larger entrance. The two vertical pillars support horizontal frames, creating a clear visual opening. This structure is so iconic that 門 serves as a major radical. You will see it framing other characters like 聞 (hear), 問 (ask), and 開 (open). In these cases, the 'gate' provides a spatial context for the action happening inside or near the entrance.

Students typically learn this 8-stroke character in second grade. It is a core requirement for the JLPT N4. Mastering 門 is helpful because it appears in dozens of complex kanji you will encounter later in your studies.

Readings

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

The primary on'yomi is モン (mon). This is the most common reading, especially in compound words (jukugo). It describes types of gates, academic fields, and professional categories. Historically, 'Mon' also referred to a specific lineage or 'house' of warriors.

Examples of モン (mon) usage:

• 校門こうもん (koumon) — School gate
• 専門せんもん (senmon) — Specialty or major
• 名門めいもん (meimon) — A prestigious school or family
• 入門にゅうもん (nyuumon) — Introduction or beginner's guide

Kun'yomi (訓読み) — Native Japanese readings

The native reading is かど (kado). While it still means 'gate,' it appears less often in daily conversation than 'mon.' You will mostly find it in traditional terms, family names (like Kadowaki), or poetic settings. The reading と (to) is rare, appearing mainly in ancient place names.

Examples of かど (kado) usage:

• 門口かどぐち (kadoguchi) — Doorway or house entrance
• 門松かどまつ (kadomatsu) — New Year pine decorations placed by the gate
• 門出かどで (kadode) — Setting off on a new journey or new stage of life

Common Words & Compounds

The versatility of 門 allows it to describe everything from architecture to career paths.

Physical Entrances

• 正門せいもん (seimon) — The main gate or front entrance.
• 裏門うらもん (uramon) — The back gate.
• 水門すいもん (suimon) — A water gate or sluice.

Academic & Professional Fields

• 専門家せんもんか (senmonka) — A specialist or expert.
• 門下生もんかせい (monkasei) — A disciple or pupil of a specific master.
• 部門ぶもん (bumon) — A division or department within a company.

Idiomatic Terms

• 門限もんげん (mongen) — A curfew (literally 'gate limit').
• 鬼門きもん (kimon) — A weak point or something one is bad at.
• 一門いちもん (ichimon) — A family clan or a school of thought.

Example Sentences

Related Kanji

• 弟 — Younger Brother, Junior (Kanji N4)
• 黒 — Black, Dark (Kanji N4)
• 洗 — Wash (Kanji N4)
• 短 — Short, brief, defect (Kanji N4)
• 田 — Rice Field (Kanji N4)
• 走 — Run, Move fast (Kanji N4)

Memory Tip

Visualize the saloon doors from an old Western movie or the heavy wooden doors of a Japanese shrine. Notice the two long vertical posts on the sides and the symmetrical frames inside. It looks like a doorway waiting for you to walk through. Remember that many words related to 'learning' use this kanji. Think of education as opening a gate to a new world.