I bought 5 packs of the Sony 4x dvd-r from staples and none of them were TY. A few of the 10 packs I bought said made in Japan and still werent TY. They were good discs still though.
I bought 2 Sony 10 packs from my Staples in Warminster, PA. DVDinfopro shows them to be TYG01. Here is what the back outside of the box says: 10DMR47L2, 10 pack written in yellow, 4X-1X,
UPC 2724262117 with these numbers written under the UPC D-03293A.
I don't know if that difers from any other 10 pack , but it might.