AISIN used to make it but sometime in 2011 or 2012 Honda changed from AISIN to YAMADA as its main supplier so now the old pumps are being remade to Yamada.. If the car still had its original WP it should be AISIN. That why the AISIN Kit makes perfect sense.
There seems to be an awful warble noise with newly installed Aisin kit. I have read on forums that 1 in 4 people have this issue, and it is recommended to replace it with Yamada instead.