Me thinks these Japanese are trying to reinvent the DC-9 or the VC10... or perhaps the BAC 1-11? Ah, those Asians... Innovative and original, as ever...

You could level the same complaint against the Dutch for the Fokker 70, 100, and 130 twin-engine regional jet airliners. According to
Jane's All The World's Aircraft 1994-1995, an underwing engine configuration was possible for the JADC YSX.