百ひゃく万まん都と市し

noun

megacity; city with over a million people

Refers to a city whose population is at least one million. Often used in demographic or urban planning contexts.

• 東とう京きょうは世せ界かい有ゆう数すうの百ひゃく万まん都と市しだ。

  Tokyo is one of the world's leading megacities.

• この地ち域いきには百ひゃく万まん都と市しが三みっつある。

  There are three cities with over a million people in this region.