Why did the Rev. Mr. Tanimoto run to the rayon man's house?

Reverend Mr. Kiyoshi Tanimoto ran to the rayon man's garden to access its view of Hiroshima.

He reflected that, although the all-clear had sounded and he had heard no planes, several bombs must have been dropped. He thought of a hillock in the rayon man’s garden from which he could get a view of the whole of Koi—of the whole of Hiroshima, for that matter—and he ran back up to the estate.