Apart from the devastating Great Kanto Earthquake in 1923, Tokyo’s old quarters have survived further tragic events: On the night towards March 10 the city of Tokyo was facing a destruction of approximately 16 square miles (41 km²) and due to the resulting long lasting firestorm many people died in the fire or then trying to escape in the rivers or parks of Tokyo. According to Wikipedia on March 10 in 1945 334 B-29s dropping incendiaries destroyed about 267,000 buildings; which equals about 25% of city and killing some 100,000.
While this figure sounds unbelievable, just imagine the actual heat in the fires, when the effects can be seen on the effects at Yokoamicho Park in Sumida Ward. According to an article in Japan Times, the park was originally built in 1930 to commemorate victims of the 1923 Great Kanto Earthquake. Later on the remains of more than 105,000 people killed in the firebombing and other raids on the capital, as well as 58,000 others who perished in the earthquake, are stored in a charnel house there.
Praying in silence for peace and protection from natural disasters,