We stock Liqui Moly TOP TEC 1800 ATF (MOL-LM20032) which carries all the required specs you need, making it comparable to the Aisin fluid. We do not have the information on the composition of the Aisin WS/AW-1, fluid but Liqui Moly states the the TOP TEC 1800 is based on fully synthetic technology with modern, high-performance additives. Since the specs are the same they should mix, but you may want to do more specific research to make sure the fluids are compatible.