Audio-Technica AT727

Original version of the Dual PRP5 and Hitachi HT-03, available in grey, yellow or bright red colors with the same Sound Burger nickname, both with a prettier top window but no colored control pads ; the Nordmende Dingi RP 200 was silver only.

There also was a Mechatron version (blue) which added a cassette player inside the housing, distributed outside Asia as (red) SkyStudio 830 !

You can see from the drawings shown here that the original design, looks-wise, was a bit more coherent and round-all-over...

Recently rebuilt/remade/rehashed under the Revolution tag by a brand named Crosley, with an USB output but in über-stupid boring black only.

As for who designed it originally, mechanically, it's either AT or Mechatron.
Given what I have discovered in eight years of doing this website regarding the inner mechanisms of the 1960s-1990s japanese audio industry, I surmise it was Mechatron... possibly commissioned by AT.

Sound-wise and mostly engineering-wise no match for a Sony PS-F5 or PS-F9 but neither was the price.

A real (export) AT727 in yello here.