we already have them, the problem is they're not environmentally friendly to extract. it's not like "oh noes this little bit of mine runoff could harm this one frog species 100 miles away that there's only like 200 of" damage, it's like "you literally mine away and erase entire mountains and dig giant craters into the earth strip mining everything" kind of damage. china is happy to do this to their own land to get an advantage producing these things and we were happy to not have to do it ourselves, but well that arrangement is coming to an end.  there's already a rare earth operation in california that is already being de-mothballed specifically to cover the slack here, and another deposit was found in wyoming recently too.
Japan