Shouldn't it separate CHRYSANTHEMUM BRIDGE from Shingo Yasumoto? It is the unit of Jun Ishikawa and Shingo Yasumoto formed on 2009. I couldn't find who August Flower is.
http://slidesunset.tokyo/artist/
http://www.showdesign.jp/
https://ja.wikipedia.org/wiki/CHRYSANTHEMUM_BRIDGE
It seems Jun Ishikawa is not this artist at HAL Laboratory though discogs regards him as the same person.
https://vgmdb.net/artist/328
https://www.discogs.com/ko/artist/3806803-Jun-Ishikawa
Apparently Ishikawa(CHRYSANTHEMUM BRIDGE/Show Design) entered avex on 2005 and worked there for 13 years.
https://note.com/fist_of_light/n/nf96c15a9c305