I was in service at the anti-aircraft unit posted in Kouyagi Island. My eyes were fixed at the sky for the duty when it happened.
"B29 passed over the Peninsula Nomo,"
As soon as one soldier said that, the bomb exploded.
It flashed and the round ball pressured on the city of Nagasaki.
The next moment, the pink and red cloud, that looked like a doughnut or "the tube for the swimming, floated on the sky over Nagasaki. It was about the size as big as Mt.Inasa viewed from Kouyagi Island.
When I reported to my captain that the altitude was 800, MUSHROOM CLOUD" rose up in the center of that doughnut. The (mushroom) cloud swelled up through the doughnut cloud.
I continued my report,
"The altitude 10,000," "12,000," "13,000."
And then I couldn't observe any more over the altitudes.
The cloud broke the shape and spread to the sides.