Lake Tahoe is about 1.2 times smaller than Tokyo.

Tokyo is approximately 619 sq km, while Lake Tahoe is approximately 502 km² (194 sq mi), making Lake Tahoe 81.1% the size of Tokyo.
Tip: This to-scale comparison of Tokyo vs. Lake Tahoe 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.