A referendum on the implementation of the Osaka Metropolis Plan was held in Osaka on 1 November 2020. In the event of a "yes" vote, the wards in Osaka City would be reorganized into special wards similar to those in Tokyo. The proposal was defeated by a slim margin of 17,167 votes (1.25%).
A previous referendum on the issue in 2015 was defeated by a similar margin. Each ward's choice exactly mirrored 2015.
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Text from the Wikipedia article “2020 Osaka Metropolis Plan referendum”, available under CC BY-SA 4.0.