Why did admiral leahy feel the use of the atomic bomb on japan was unnecessary?

He felt it was inhumane because America had clearly pulled ahead in the war are were simply waiting for Japan to surrender, so the bomb drop was unnecessary and excessive in his opinion. 

“destroyers for bases agreement in the destroyers for bases agreement between the united states and the united kingdom on september 2, 1940, fifty caldwell , wickes, and clemson class us navy destroyers were transferred to the toyalbnavy from the united states navy in exchange for land rights on british possessions.” i hope this you .

Sponge bob ate the crab