Any information about nagisa/Mao Sasagawa?

I have been trying to find information about why Mao Sasagawa scrubbed his old vocaloid songs. He used to go by nagisa.

I love a lot of his old songs and have some archived, but a few days ago, I tried to find a song on my mind and I can't find it anywhere!

I do love his new songs, especially his collaborations with RIM, but I do appreciate and enjoy a lot of his older songs.

Any information would be appreciated! Also if anyone has any archived songs, let me know.