On the morning of May 14, 1945, four PV-1 patrol bombers of US Navy VPB-137, each armed with 8 5-inch rockets and 3 250-lb “para-demo” bombs, took off from Clark Field to strike targets in the Shoka (currently Changhwa) area of Formosa. They were in two two-plane sections. The first section flew to a point 10 miles southwest of Taichu (currently Taichung), then turned north to Ujitsu (now Wuri). One PV-1 fired 8 rockets at a plant believed to be a Butanol plant on the outskirts of Ujitsu. Two hit the buildings, two in a narrow space between two builidings, and 4 were in the main buildings. The other plane fire 8 rockets at the same plant: 6 into the main buildings, 2 just over. The above strike photo (click to enlarge) reveals that the plant under attack is the former Ujitsu sugar plant. It is not known whether the plant also produced Butanol at that time.
Ujitsu sugar plant in March 1944:
Ujitsu sugar plant in January 1945:
The next photo, covering about the same area, was taken in 1959. A few years later, the Ujitsa sugar plant was closed and subsequently converted to a beer factory.
The same area today: