I don't think anyone knows because some of them completely disappeared without a trace. I am still trying to figure out what happened to Masaru Nakajima and Takahiro Tsunashima.
Still, this is really sad news for me since I really loved his work with Falcom. Though he is considered the leader of the second wave of composers, I don't think there's a single track credited to him during his time in Falcom, but little by little I might figure a few things out. And I just got into his newer material such as
Fermata. Unfortunately, this is too difficult for me to get being in the West.
If you're interested,
Hiro's Youtube account was updated yesterday.