Odd that this got so much attention, all I see is a fuzzy back shot of person who could be AE but who could also any person of either gender with a slim build and medium length hair. The barge being towed also could easily be many other things, not really sure how they estimated the size with such precision I would think land marks of known distances would be required, is Jaliut harbour identical today so that they could get them. It is apparently undated. Really just a misfiled random photo of a harbor in the Marshal's at some point around WWII . I think that being misfiled is how it wasn't purged along with all evidence of the Japanese capture theory, of course it may have been properly filed and had nothing to do with AE.
The "computer forensic examiner is quoted as saying "I can say with more than 99.7 percent confidence that the photo is authentic and untouched,” all that means is that it wasn't photoshopped.