Sharaku is part of the Mustard genus and is a Japanese mustard spinach variety. Its scientific name is Brassica rapa var. komatsuna 'Sharaku'.
Sharaku Japanese mustard spinach is great for inexperienced gardeners and those that like low maintainance gardens.
This variety plant info is provided by the myfolia gardener's wiki. All details about Sharaku have been kindly provided by our members.