KOKEN LTD revenue for the last year amounted to 10.59 B JPY, the most of which — 9.27 B JPY — came from its highest performing source at the moment, Mask, the year earlier bringing 9.05 B JPY. The greatest contribution to the revenue figure was made by Japan — last year it brought KOKEN LTD 10.59 B JPY, and the year before that — 10.60 B JPY.