All CLOTHING FOR ENJOYMENT ACE MEN'S WEARING!
This is a full page advert designed by a Japanese artist named Eiiche Hasegawa which featured in the January 1971 issue of Gebrauchsgraphik International Art magazine―it was a prize-winning poster design in the 18th annual exhibition of the Japan Advertisement Artists Club Tokyo. However, apart from the name credit and brief description, there wasn't any other information about the artist, and so far I haven't been able to track down anything. Fantastic work though! I really like the mix of collage and graphics, and I wouldn't be at all surprised if an alternative psychedelic colour version of it existed. I reckon there's one out there somewhere...just waiting to be found!
Image scanned by Sweet Jane from Gebrauchsgraphik International Advertising Art January 1/1971. Poster design by Eiiche Hasegawa.