SPK CORPORATION revenue for the last year amounted to 54.70 B JPY, the most of which — 27.29 B JPY — came from its highest performing source at the moment, Domestic, the year earlier bringing 24.84 B JPY. The greatest contribution to the revenue figure was made by Japan — last year it brought SPK CORPORATION 34.96 B JPY, and the year before that — 31.51 B JPY.