I can’t speak for Japanese movie posters, but back in the 60’s, posters sent out to British cinemas were folded, not rolled. Modern ones seem to be sent out rolled, I’ve not noticed crease-marks on the ones I see on display at my local cinema.
Somewhere I’ve got several I got from that same cinema, I was allowed to sort through a pile in a cupboard and take any I fancied for 50p each. Wouldn’t happen now!
I’ve got posters for ‘The Man Who Fell To Earth’, with Bowie, LED Zeppelin ‘The Song Remains The Same’, and ‘La Vallee’, music by Pink Floyd. I wish I’d grasped ‘Clockwork Orange’ and ‘2001 aSpace Odyssey’ while I had free access to that treasure trove.
Another thing just occurred to me – I doubt very much that in 1975 posters were printed on International B-size paper, the most common sizes are One-Sheet, 27”x40”, or Bus Stop, 60”x40”
Movie Poster Size