japa :

Cultivation:

Prefers a well-drained humus rich fertile soil in full sun or partial shade
Plants will often lose most of their leaves in cool winters, though they will normally regenerate quickly as the warmer weather returns[

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].
A very variable plant
There are many named forms, selected for their ornamental value

Propogation:

Seed - sow in situ or in containers. Germination is usually quite rapid. Prick out container-grown seedlings into individual pots when they are large enough to handle and plant them out into their permanent positions when they are 10cm or more tall.
Cuttings of half-ripe wood in a frame.
Cuttings taken with a heel of the old wood root easily if placed in a jar of water.
Grafting.