Learn the basic knots used in tenkara fly-fishing. Tie your tenkara line to rod, tippet to line and fly to tippet.
There are a few knots that are more or less specific to tenkara. They are very easy to learn. Though this video is a bit long it goes into detail on how to exactly tie each knot: how to tie the tapered line to the tenkara rod, how to tie the level line to the rod, how to tie tippet to level line and tippet to fly, and how to use the line holder.