South Bend is about 6 times smaller than Tokyo.

Tokyo is approximately 619 sq km, while South Bend (map shows its 30 named neighbourhoods; the area covers the whole city) is approximately 109 sq km, making South Bend 17.53% the size of Tokyo.
Tip: This to-scale comparison of Tokyo vs. South Bend uses the Mercator projection, which distorts the size of regions near the poles.
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