Tensai was a word which meant "prodigy," and that was what these students were. The Isawa Tensai were a very specialized brand of shugenja exclusive to the Phoenix Clan. Whereas most shugenja schools focused on one element especially, the Tensai focused on one element exclusively. An experienced Tensai would be among Rokugan's most powerful shugenja within his element of expertise, but incredibly weak in the other elements.