Projects in Japan may use JIS filter standard as alternative to ASHRAE 52.2 MERV requirements, as follows:
E(4) 25%, as defined by JIS B 9908:2011 as alternative to MERV 6
E(4) 60%, as defined by JIS B 9908:2011, as alternative to MERV 8
ePM2.5 36%, as defined by JIS B 9908: 2018, as alternative to MERV 11
ePM1 49%, as defiend by JIS B 9908:2018 as alternative to MERV 13