What does the cartogram tell you about japan?

Shows the situation of Japan after the bombing.

On the night between March 9 and 10, 1945, 334 B-29 bombers rained hell over the densest city on the planet. Nearly half a million incendiary bombs hit Tokyo in Operation Meetinghouse, probably the worst mass bombing of civilians by aerial bombing ever. Their numbers, estimated between 80,000 and 140,000 fatalities, are, on average, worse than those in Hiroshima (70,000 to 122,000).