From what I understand this is actually Dai Fujiwara's work. He worked with Issey Miyake on A-Poc and has now taken reigns over the mainline. It has previously been designed by Naoki Takizawa. Issey Miyake himself has been working exclusively on A-Poc since 1999.
It looks like he's using all of the house's iconic techniques, pleating, a-poc, and who knows what else.