How to Propagate Japanese ginger?
Propagate by division of well-established plants in early spring, or by separating and replanting sections of rhizome 15-20cm long in spring or early summer

Japanese ginger · Zingiber mioga
Also known as: mioga ginger
Grow in rich, organic, well-drained, acid or neutral soil in sun or partial shade
Propagate by division of well-established plants in early spring, or by separating and replanting sections of rhizome 15-20cm long in spring or early summer