Wikipedia has this to say:
An Eashi Oiwake song consists of three sections:
• Mae-uta (beginning song);
• Hon-uta (main part or original song)
• Ato-uta (final song)
The Japanese Shakuhachi flute accompanies the singing which has a free rhythm rather than a mechanical, fitted rhythm.
What I did was the easy part 🙂
With a bit of luck, I got my “Utas” in the right order …