Conversation so far:
Can you name an album that Merzbow released in that period from 2009 to present ?
Gensho, the seventh collaborative releases with Boris, was released in 2016.
How was the album Gensho received by critics ?
It is a double album, one disc is by Boris and one by Merzbow, that are meant to be played at the same time.
How did the double albums do in the charts ?
CANNOTANSWER.
did he collaborate with anyone else during that period ?
Merzbow also released several collaborations with industrial/noise musicians he had know since the 1980s: Spiral Right / Spiral Left with Z'EV.

Question: What happened for Merzbow in the year 2009 ?
Self-contained rewrite: What happened for Merzbow in the year 2009 ?