Tokyo is about 9 times smaller than Istanbul.

Istanbul is approximately 5,343 sq km, while Tokyo is approximately 619 sq km, making Tokyo 11.59% the size of Istanbul.
Tip: This to-scale comparison of Istanbul 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.