Inomata and Yokoyama succeeded in obtaining the transformed roots from P. ginseng, which is an important plant used as a cosmetics ingredient. They induced more than 100 transformed roots and selected 34 clones to be subcultured in liquid Linsmaier and Skoog media R52 clone was finally selected because of a unique quality: superior growth rate with high ginsenoside productivity, and stability of these features during subculture