I finally made a video to summarize music style of Takahiro Unisuga:
https://www.bilibili.com/video/av28063653
niconico mirror:
http://www.nicovideo.jp/watch/sm33643401
http://www.nicovideo.jp/watch/sm33643599
Recent years his style has become more and more obvious, and easier to distinguish from Hayato Sonoda. If he quit I will probably lose interest in sound team jdk