Number 1 (photo ends in 117925). Nothing looks off to me, but I am not a native speaker/reader. The issue I have is that there is nothing on it that ties it to any place or time. It's a generic flag with a bunch of names on it. If you are looking for WW2 memorabilia, this wouldn't be a particularly outstanding item to have. It's just like finding an old tire and somebody telling you a story of how it was used at Normandy or something. Could be true, could be fake, but you would be buying the story and not buying the artifact.
Number 2 (photo ends in 117926) - at least this one has a patriotic slogan on it ("Praying for Good Luck in Battle"), and then the presumed, intended recipient's name, Yamamoto Hiroshi. This one feels plausible, but again there is nothing solidly connecting it to any time or place. Well you might be able to triangulate who the recipient is/was by researching the names and finding out if there was a common location, but it's an impossible task unless you had access to enlistment rolls, which aren't publicly available. The name "Yamamoto Hiroshi" itself is such a generic name, it would be hard to pinpoint who owned this.
So of the two, I'd say Number 2 is slightly more interesting, but only slightly.