Complex sentence: He's a close friend of Sato Takeru as they're both in the same agency Amuse and also went to New York together to do a documentary show which was released 2010 as a DVD.
Split into simpler sentences: He's a very close friend of Sato Takeru and they're both in the same agency Amuse. Miura and Sato went to New York together to do a documentary show which was released 2010 as a DVD.