Either you call Mayshowa and ask for authorised Eneos dealers or shop for Mitsubishi engine oils at Aeon.

Haha ok its up to you lor, coz its your money anyway. Using such expensive oil on your engine is actually a waste of money, just like using RON 97 on a Myvi for example. Also if you buy from reputable sellers, it will be genuine oil. Liqui Moly also only sold in independent workshops so there's no guarantee they don't sell fakes. If you really want to spend that much though, might as well buy Amsoil, more proven. Price might be slightly cheaper but maybe a bit more difficult to find.