Translation guide
A very large, heavily populated urban region consisting of multiple cities and suburbs that have grown together.
The speaker wants to refer to a huge, continuous urban area formed by the merging of several cities.
Direct loanword from English, widely understood in Japanese. Used in geography, urban planning, and news contexts.
東京から大阪にかけての地域は、日本のメガロポリスと呼ばれています。
The area from Tokyo to Osaka is called Japan's megalopolis.
Literally 'giant metropolitan area'. A more formal, descriptive term often used in academic or official contexts.
この巨大都市圏には3000万人以上が住んでいます。
Over 30 million people live in this megalopolis.
Loanword 'megacity'. Often used for a single huge city, but sometimes extended to a megalopolis. Less precise.
東京は世界最大のメガシティの一つです。
Tokyo is one of the world's largest megacities.