Yes, they're bolt-ons.
Don't fall into the trap of thinking all old Japanese LP copies are top quality guitars. They made loads of cheap ones too, including ones with bolt-on necks, bodies made from loads of pieces of unidentifiable wood, terrible quality tuners and weird single-coil pickups under humbucker covers.
The bolt-on doesn't mean it won't play well, of course, but don't pay a lot of money for it, because it will be one of the lower-end models.