What does Japan n95 mean?

Japanese n95 corresponds to Chinese n95.

N95 mask is one of nine kinds of particulate matter protective masks certified by NIOSH (National Institute of Occupational Safety and Health). N95 is not a specific product name. As long as it meets the N95 standard and has passed the NIOSH evaluation, it can be called N95 mask with an aerodynamic diameter of 0.075? m 0.020？ The filtration efficiency of M particles is above 95%.