From Osaka came the 'musical anarchist' Tadamaru Sakuragawa (?? ??, Sakuragawa Tadamaru), who sang in a style called goshu ondo.
With the backing of the now disbanded Spiritual Unity, Tadamaru broke out of the festival circuit with his only album, Ullambana, released in 1991.
Ullambana is a Sanskrit word that refers to a Buddhism sutra, and is the origin of the Japanese word Urabonne whose shortened form Bon or Obon is now widely used throughout Japan.
Tadamaru's music is characterized as a radical new workout of summer festival music from Kansai area of Japan.
The song Yui Maru Bushi from the album can be found here:
http://www.bbc.co.uk/radio3/world/guidejapan2.shtml
https://www.youtube.com/watch?v=r1W7EGULc6sTadamaru retired in 1995 and passed his name to one of his pupils who now sings as Tadamaru Sakuragawa II (??? ????).
Music of Japan