the SM-B-80TE and the SM-B-80TC training boards seem to be the first computers made by Sharp having the general public in mind.
At the time, a professional division of Sharp already sold a range of computers called Hayac. These boards, as well as the first MZ computer series were conceived by the Sharp parts division as a market test.
The same board concept could be found in the USA since 1985 (MOS Kim 1, Intel SDK-85) but Sharp was one of the first manufacturer, with NEC, offering a Japan made training board.
Thanks to Ohishi Nuboaki and his Sharp MZ dedicated website
BUILT IN LANGUAGE
Mechanical 25 keys - Hexadecimal and function keys
Z80 (LH-0080 Sharp version)
2 KB static RAM expandable to 4 KB
2 KB expandable to 8 KB
8 x 7 segment Led display
SIZE / WEIGHT
27 (W) x 19(D) cm.
100-pin expansion connector, Z80 PIO interface connector