This second variant of Sashi (or Saji) came to the Meian ItchoKen Temple after its discovery in Hakata, on the island of Kyushu. It is a more complex version of the basic Sashi form, expressing the emotions of love, affection and piety which are felt when contemplating Buddha’s death. It is played as a kind of offering or prayer for peace, calling for all to follow along in the path of Buddha.
Source: The International Shakuhachi Society
Here is a practice recording of the Hijirikai version.