I believe it's Denso. If you order the filters in bulk and online, it will save you a trip to the dealer and some money too.
I agree somewhat but, when does OEM exceed the aftermarket? If it did, this site wouldn't exist. Not to mention the fact that the overseas market OEM filters are hard to find here (my stealership does not stock them, says they can't find them).Something worth noting is that even though Denso makes all of Toyota's filters, Denso does have various types, so just reading about "Denso" filters won't give an accurate representation of all that's out there.