via this Reverb listing

Made in Japan
Released 1984
220v
with MIDI kit updrade installed.
Rare musical instrument developed by Sakata, later distributed by Hammond. This digital drum machine uses same technology as Linndrum with samples on eproms. The MIDI kit (developed by FPB Synth Germany) is freshly installed for the sale.
Unfortunately, I lost the RAM card a while ago, so the pattern memories and internal sequencer are not usable… This said the MIDI kit upgrade allows you to control the drum machine from any device including modern sequencers!
So, you have access to the 22 samples via MIDI + you can trig manually at the same time.
Sounds are internally spread over a stereo field (stereo output), you also have independent mono outputs and a phones out . Of course you have the volume fader for each voice (8 sliders) and a general volume knob. So, a nice flexibility for studio environment.
Great sounding drum machine, punchy and pretty unique samples — the cymbals are really interesting. You know, 8-bit unsigned PCM sounds but realistic for the time… it delivers a great vintage flavour. As eprom based, you can totally custom your instrument. The sounds here are stock. One of the eprom has been cloned by FPB too."