Year 8 is by far the most valuable 1 Yen, so a logical candidate for a forgery. And on a genuine coin, the characters for "year" and "Mei" do not overlap the beaded circle. Pure fake.
The dots between numbers/characters are also misaligned and irregularly spaced, and the 八 (8) is also wrong.
Thanks guys, I just found it an the magnet wouldn't stick. I don't know much about coins but gonna try an start collecting