As I understand it these flags were given to Japaneseicon soldiers when they went to war by their families. The family members would write well-wishes and farewells on the flags as in this example.

I have heard that many WW2 veterans, or their family members, have returned these flags to to Japan so that the Japanese families will have some remembrance of their lost loved ones.

Not knowing how to post a link, just enter the following search to learn more:

'Aging U.S. Veterans Seek To Return Captured WWII Flags To Japan'

Just so you know - do as you wish of course....