The report can be downloaded from here:
https://catalog.archives.gov/search?...estorNaIds=421
This plane. "Big Ain't It" was one of 26 B-29s lost that night in a fire bomb raid on Tokyo.
The MACR has no information on where the plane was lost. "Airplane took off from West Field, Tinian at 0800Z on Combat Mission - No messages were received." There is no mention of any search being conducted.
There is some information about the raid on this link, search for "42-65273":
https://user.xmission.com/~tmathews/...ars-4505b.html
There is a photo of the plane here, again search for the serial number.
https://www.444thbg.org/677thsquadron.htm
There does not seem to be any specific info available as to exactly where or how it was lost. All the crew is still listed MIA.