It seems that there’s a website by a former Virtual Boy developer that recounts about his experience with the gaming industry, with one of them mentioning a mahjong title for the system that would 99% be Virtual Double Yakuman. Here’s his Twitter: https://twitter.com/tw_tamasangara
It would be equally fascinating if not about mind blowing if there was some working code that somehow just appeared in the wild as well. Sure it’s yakuman, but hey mahjong is pretty fun and beggars can’t be choosers when it comes to lost titles or anything new popping up on the system that works.