| 天皇機関説 | theory of the Emperor as an organ of government |
| 立法機関 | legislature, legislative body |
| 諜報機関 | intelligence agency, secret service |
関係づける 関係付ける | to relate to, to connect with |
| 関鍵 | locking doors, lock and key, vital point |
| 関西馬 | Kansai horse |
| 関心が高まる | to take a growing interest in |
| 関数族 | family of functions |
| 関東一円 | whole district of Kanto |
| 機関座 | seat of an engine |
| 実関数 | real variable function |
| 善隣関係 | good neighborly relations, good neighbourly relations |
| 台中関係 | relations between Taiwan and China |
| 対中国関係 | relations with China |
| 力関係 | power relationship |
| 日印関係 | Japan-India relations |
| 舶用機関 | marine engine |
| 深い関係 | close connection, deep involvement, close relationship |
| 伝達関数 | transfer function |
| 衝撃関数 | impulse function |
| 意味の関係理論 | relational theory of meaning |
| 上下関係 | pecking order, hierarchical relationship, vertical relationship, hyponymy |
| 相関ルール | associate rule |
| 利害関係者 | interested parties, persons concerned, stakeholder |
| 関説 | allusion, alluding, related explanation |
| 異性関係 | relationships with the opposite sex |
| 関係官庁 | government agencies concerned with ... |
| 関係詞 | relative |
| 関係書類 | relevant documents, (all) the documents related (to the matter) |
| 関係法規 | related laws and regulations |
| 関数方程式 | functional equation |
| 関数論 | theory of functions |
| 関連事項 | related (relevant) matters, matters relevant to the subject |
| 関連質問 | follow-up question, related question, interpellation on related matters |
| 機関室 | engine room |
| 機関長 | chief engineer |
| 機関投資家 | institutional investor |
| 議決機関 | legislative organ |
| 信頼関係 | relationship of mutual trust, fiduciary relation |
| 真理関数 | truth-function |
| 親子関係 | parent-child relationship |
| 親族関係 | kinship |
| 政府機関 | government body, government agency |
| 税関申告書 | customs declaration |
| 相互関係 | mutual relationship, interrelationship, interaction |
| 肉体関係 | sexual relations, physical relations, carnal relations |
| 夫婦関係 | marital relationship |
| 命題関数 | propositional (sentential) function |
| 輸送機関 | (means of) transport |
| 友好関係 | (establish) friendly (cordial) relations (with, between), (form) friendship (e.g. with a nation) |
| 有理関数 | rational function |
| ガス機関 | gas engine |
| ダンピング関税 | anti-dumping duties |
| ディーゼル機関車 | diesel locomotive |
| 一価関数 | single-valued function |
| 永久機関 | perpetual motion |
| 往復機関 | reciprocating engine |
| 可逆機関 | reversible engine |