They're both definitely making them. If you got to a retail store in Japan, they'll have a HUGE section filled with BD-Rs and if you search Amazon JP you can se

They're both definitely making them. If you got to a retail store in Japan, they'll have a HUGE section filled with BD-Rs and if you search Amazon JP you can see that tons of them are in stock. You can always import them yourself. Tenso and Buyee both work great. I think it's just that the western market doesn't care for them much, so you don't see anybody bothering to import them for you.