1. Tokyo, Japan

1. Tokyo, Japan
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Current population: 37,274,000 people

Believe it or not, the largest city in the world actually saw a population drop of -0.18 per cent from 2021. That trend is expected to continue and to increase through 2035, so that 16 years from now, Tokyo will house almost 1.5 million fewer people than it does today.

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Source: RD.com

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