The following video will walk through the proper Tenkara casting technique for tightline nymphing. The cast is the foundation in making sure you accomplish the three most important aspects of tightline nymphing.
Maintaining a tightline throughout the drift for strike detection
Getting your fly(s) deep as quick as possible
Having a direct connection with your fly so you can guide it through the seam you are targeting
For step by step instructions on tying the leader used in this video click here