English should adopt the French convention of capitalizing the family (last) name. For example, this would make it ABE Shinzo, which would remove ambiguity. When encountering East (thanks for the reminder) Asian (or Hungarian, for that matter) names in emails for example, I'm usually worried about if their "last" name in the directory is their given name and what they should be addressed by or their actual last name.
Fun fact: some German names (e.g. Strauß) change spelling when capitalized. The letter "ß" is a ligature that only exists as a lower case letter and has to be written as "SS" when capitalized. Names are fun. I recently had dealings with a company that assumed in its employee roster that the last word entered in the name field was your last name (i.e. anything beyond the last space). One of my coworkers was from Spain…
It's two last names, father and mother first last names. I guess the same definition works, but it's worth noting that any last name might contain a space.