Nikumaki is a Japanese term that means "meat roll" or "beef roll". It is usually used to refer to a dish of thinly sliced beef wrapped around vegetables and marinated in a teriyaki sauce. However, in relation to bonsai, nikumaki is a technique of wrapping the roots of a tree with moss and soil to keep them moist and healthy. This technique is especially useful for trees that are sensitive to dryness or transplanting stress, such as maples and azaleas. Nikumaki can also help create a more compact root ball and improve the appearance of the nebari (the surface roots).