Down the right side of the flag: "Congratulations on going off to war, AKARI Kimio"
To the left of that is "Good Luck in Battle".
On the left side is "From all of us at NIKON Corporation, Kawasaki Factory".
The rest are signatures of workmates of AKARI Kimio.
This is in an exceptional state of preservation.
If you were interested in returning it to Japan, there is a group called the Obon Society who works to repatriate this stuff. Or, the Japanese embassy may be able to help as well.
OBON SOCIETY is a non-profit humanitarian effort dedicated to the pursuit of peace. We provide opportunities for reconciliation between families through the return of personal items taken during war.
www.obonsociety.org