PB Jayakumar / Mumbai May 2, 2009, 0:14 IST

Tokyo's policy push for generics an added draw.

Leading Indian drug makers such as Ranbaxy, Lupin, Zydus Cadila and Dishman, which forayed into Japan in the past three years, have emerged as important players in the generic or copycat drug business of patented medicines in that market, the second largest in the world.