"World Band Radio Monaural" AR-MD20 (price 9,690 yen) and
"World Band Radio Stereo" AR-MDS25 (Price 14,900 yen) -
on Japanese market in November.
It seems AR-MD20 is the OEM of Tecsun PL-310ET,
AR-MDS25 is that of Tecsun PL-398MP.
Aiwa Co. Ltd was once a subsidiary of SONY, but was dissolved in 2002.
Towada Audio Co. Ltd (in Akita prefecture), which was a subcontractor in production works of SONY world band receivers such as ICF-7600GR, acquired the "Aiwa" trademark and set up the new subsidiary company of the same name in Japan in 2015.
(Takahito Akabayashi, Tokyo-JAP, via wwdxc BC-DX TopNews Nov 23)