I hate to say MITSUI is not that great for anything. Discs age quite quickly and some players just can't playback audio without errors.
I'm getting best results with these FujiFilm
discs. They're made in Germany.
Then you probally bought some newer stock of MAM and you might even have used the so called Golden Dye media. WHich is Mitsui Silver media that didn't finish all internal quality tests for real Silver media.
I have used Mitsui made disc's in the past very much. And I can say there compatabiloity is really above average. Infact this is the only media my old Philips 3610 burner can still burn and the only media that will work as good as real cd's on my parents JVC stereo after the lens is covered. with dust ones again.
$1.00(Canadian or american) a disc. Is that to high for media used for testing. Hmm I have seen Mitsui profesional media seeing sold for prices up to 3 euro's.
Fuji Germany is nice media. However they allways score bad when it comes to accelerated ageing, humidity and corrosion. In all the quick tests just based on burn quality the media is up at the highest places.
However I wouldn't use them for archiving after the test results and after the comments of a local store owner not to buy it since Fuji rots away in his car because of humidity. So he would recommend me the cheaper but 1-16x limited verbatim metal azo disc's since these never gave him problems.( And that batch never gave me problems even my allmost Dead Lite On could burn these but with sky high errors that is.)