I followed the link, no luck.
Intertube search revealed that they make UR (ferric) level tape for Japan. (I admit I may have missed something!)
No type II or IV.
Bring back "chrome" and "metal," baby!
I appreciate the article.
You know why analog (LP and tape) is the best? No dumbass with an iPhone can try to hijack the playlist at a party when it's vinyl or cassette! (CD, too, to be inclusive. Physical media rock that way!)