There's a WiMAX brand selling "WiMAX 2+" but that is just LTE.
I actually still have a legacy wimax device and plan active since it was the last plan with true unlimited with zero "fair use". It also had a usage scale so on months I don't use it it's only 300 yen. So a good backup device. I've loaned it out to people who had have to spend a week in hospital (no wifi) and they've burned through 30 GB streaming video
with no issues. They send me letters every couple months urging me to upgrade to a new plan that all cost 4000/mo and have fair use data caps.