leppon is a hoax filter, its marketed as malaysian flter but its made in china supposedly as per malaysian standards. if thats the case then Qaims made as japan since they incorporated with a japanese filter company when they started.
Guard is not OEM Honda, at one point it was but Honda couldnt manage with the complaints so they switched back to Thailand.
Qaim has new Honda city filters and should be increasing its capacity of manufacturing filters very soon as expansions in progress.
and yes local oems and replacement parts are as good as genuine as its the material in use that counts.