Shit guys, have you seen the list of goods banned? It's 147 pages and it's crazy!
Here's a sample:
View attachment 167719
That's not "well it's like the RE ban but a bit stronger", this is some "Japan, you are now banned from chemistry" type thing. Look at that list, even common chemicals like iodine, activated carbon, mercury, ethonol, red phosphorus etc etc are banned on account of "could be used in the manufacturing of illicit drugs". Elsewhere in the list, even things like table sugar is banned because it could be used in making explosives. The best part is has a catch-all clause at the end that says anything further that could be used to strengthen Japan's military could be added to the ban list at a moment's notice.
To even start to make their own RE Japan would first need to rebuild back up their own set of modern industrial scale chemical production.