This was an daylight precision mission involving 22 planes from the 6th Bomb Group:
Target for the next mission on 10 May was the airfield at Usa on northern Kyushu, (named for “Made in U.S.A.”). Missiles were 1000 nd 200 pound GP bombs with fusings ranging from instantaneous to thirty-six hour delay. Bad weather caused difficulty in making assembly. Only fifteen planes hit the primary target, but results were excellent as reported by visual observations. Other planes bombed targets of opportunity. Fighter opposition was aggressive as twelve to fifteen twin-engine fighters attacked the Sixth formations but only two planes were damaged. Sixth gunners shot down three enemy planes.
[Pirate’s Log, p. 43]