Cincinnati is about 3.1 times smaller than Tokyo.

Tokyo is approximately 619 sq km, while Cincinnati is approximately 202 sq km, making Cincinnati 32.6% the size of Tokyo.
Tip: This to-scale comparison of Tokyo vs. Cincinnati 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.