Japanese Elm Bonsai Tree (Ulmus davidiana var. japonica) in a 6" Glazed Ceramic Bonsai Pot
For proper Japanese Elm Care just follow these basics and listen to your tree =). The Japanese Elm is an outdoor tree, can be kept indoors but will need a few hours a day of direct sunlight or allot of fairly strong indirect sunlight. If you have a window that gets good light that would work and keep the tree away from drafts. Outdoor is preferable though. The tree prefers much light, but strong direct light can burn the leaves.
Water regularly as usual, but let it dry out between watering. Use a good free draining bonsai soil like Akadama, or Lava Rock, Perlite, and a little bit of pine bark and grit.
When new growth extends at least 3 nodes then prune back to 1 or 2 leaves. Japanese Elms / Zelkovas fill in well with proper trimming.