Tokyo is about 1.3 times smaller than Kyoto.

Kyoto is approximately 828 sq km, while Tokyo is approximately 619 sq km, making Tokyo 74.77% the size of Kyoto.
Tip: This to-scale comparison of Kyoto vs. Tokyo uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.