Is there a complete physical archive of Weekly Shounen Jump (or Shounen Sunday or Shounen Magazine)? Considering that Weekly Shounen Jump (or Sunday or Magazine) have given rise to many franchises of great cultural significance, is there a library, museum, or some place that has a complete physical archive of these periodicals, in Japan or anywhere else? If there is any such archive, I would think that'd be an interesting place to visit.
At least, It should be in National Diet Library.

Under Japan's law, all publishers need to submit 1 copy of all of their books and magazines to that library.

Some people succeed to read Jump in there, but it's not a normal library. You may need pre-reservation and require security to enter, but you can search their item from their official website.