| 陣門 | surrender to the enemy |
軍門に下る 軍門に降る 軍門にくだる | to capitulate, to surrender, to submit to, to concede |
| 肛門科 | proctology clinic, proctology |
| 節足動物門 | Arthropoda |
| 専門職 | professional job, profession |
| 大砲三門 | three cannons |
| 稲門 | alumni of Waseda University |
| 門戸を閉ざす | to exclude, to close the door to |
| 意味部門 | semantic component |
| 音韻部門 | phonological component |
| 基底部門 | base component |
| 辞書部門 | lexicon |
| 範疇部門 | categorial component |
| 変形部門 | transformational component |
| 毘沙門天 | Vaisravana (guardian god of Buddhism) |
| 工業高等専門学校 | technical junior college |
| 専門科目 | special (specialized, specialised) subject |
| 専門雑誌 | technical journal (periodical, magazine) |
| 専門的知識 | expert (technical) knowledge, expertise |
| 旗門 | (slalom) gate |
| 閘門 | lock gate |
| 亜門 | subphylum, subdivision |
| 入門書 | primer, manual, introductory book |
| 環境問題専門家 | environmentalist |
| 民間部門 | private sector |
| 澳門 | Macau, Macao |
| 関門海峡 | Kanmon Straits (between Honshu and Kyushu) |
| 専門誌 | specialist journal, specialized magazine, specialised magazine |
| 一門別総当り | obsolete rule prohibiting match-ups between wrestlers from the same group of stables |
| 門戸開放 | open door policy |
| 門前雀羅 | (a house) looking deserted with few visitors |
| 門出茸 | departure mushroom |
| 専門馬鹿 | person who is ignorant outside his field |
| 蟄居閉門 | house arrest, being placed in confinement at home |
| 閉門蟄居 | house arrest, being placed in confinement at home |
| 門前成市 | having a constant stream of visitors, being thronged with callers |
| 被子植物門 | Magnoliophyta, Angiospermae, phylum of flowering plants |
| 四脚門 | style of temple gate featuring four supporting pillars and a gabled roof |
| 禁門の変 | Hamaguri Rebellion |
| 蛤御門の変 | Hamaguri Gomon incident (1864 clash between pro and anti-shogunate forces) |
| 名門校 | prestigious school |
| 天安門事件 | Tiananmen Square Incident, Tiananmen Square Massacre |
| 平将門の乱 | Taira-no-Masakado Rebellion |
| 専門性 | specialization, specialty, speciality, expertise |
| 不採算部門 | unprofitable department, loss-making division, loss-making segment |
| 門前の小僧習わぬ経を読む | you learn, without realising it, from what is around you, a young monk outside the gate can read sutras he has never studied |
| 専門家グループ | group of specialists, group of experts |
| 気門 | spiracle (respiratory pores in the body of insects) |
| 笑う門には福来る | laugh and grow fat, good fortune and happiness will come to the home of those who smile |