Real WW2 Japanese "good luck" Flag?

[RasgoneEnig]

Hello everyone,

Recently I came across what appears to be a WW2 "good luck" Japanese flag. I don't speak japanse, so I don't know if this could be real or just a recent sport's flag or something else. Can someone translate it?

Thanks for your replies!

PS: I think some of the photos I took could be on the wrong side, making the kanji characters be on the wrong position. So sorry if this make the translation harder.

[RasgoneEnig]

I forgot to put the measurements: the flag is 70cm long and 30cm wide.

[ghp95134]

Yes, it's an authentic signed flag ... but you are showing the backside.

祈皇軍武運長久
Prayers that the Imperial Army Will Have Continued Luck in the Fortunes of War

It should be turned around:


It will be darker on the obverse -- and easier to read.

-- Guy