According to the Korean Neofinetia Association website:
Tenzan, 天山
Originally found in Shimane Prefecture, Japan. Bean leaf with thick leaves with good deep green color. Particularly, the tips of the leaves on this variety pinch together at the tip in a particular shape called Suzumushi-Ken. (Not as pronounced as in the variety Suzumushi, but similar). Not to be confused with the striped variety with the same name. Mud stem, mud root, waveform tsuke.
Tenzan 天山 - Korea Neofinetia Association