The Terada made Epiphones start in 1987 when Yamano took over the Gibson distribution and agency in Japan and contracted Terada to make them.
The Orville by Gibsons start in 1988 and Yamano got Terada to build them as well.
The Terada made Epiphones seem to have 5 digits with the first digit being the year.
Pre 1987 the Epiphones were made by Matsumoku and distributed by Aria.