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UrumaDelvi (うるまでるび) are a Japanese husband and wife duo[1] who recorded the song "Oshiri Kajiri Mushi", or "bottom-biting bug."[2][3] The song was intended to encourage people who live in big cities to spontaneously interact with each other.

The video debuted in June 2007 on the children's music video program Minna no Uta. Videos typically remain in rotation for two months on Minna no Uta, but Oshiri Kajiri Mushi is the longest-running video on the program as it aired continuously for over five months.[4] The song climbed up to number 8 from outside the top 100 on Oricon, the singles chart in Japan, and steadily climbed the charts to number 6 in the Fall of 2007.[5] The cartoon bug featured in UrumaDelvi's music video stars in his own anime series.[6]

In 2013, UrumaDelvi teamed up with Ryuichi Sakamoto of Yellow Magic Orchestra and David Byrne of Talking Heads to make a music video set to the song "Psychedelic Afternoon". The music video was part of a series of 3 videos produced by Zapuni in order to raise money for charities that helped children after the 2011 Japan earthquake.[7][8]


  1. ^ Official Website (Japanese)
  2. ^ McLeod, Shane (2007-10-13). "Japan sinks teeth into 'bootom-biting bug'". ABC News (Australia). Retrieved 2007-11-25.
  3. ^ Salzberg, Chris (2007-08-26). "Japan: Crazy for a Bug". Global Voices Online. Retrieved 2007-11-25.
  4. ^ ""Oshiri Kajiri Mushi" keeps on going". Tokyograph. 2007-10-18. Retrieved 2007-11-25.
  5. ^ "Charts: KinKi Kids and V6 on top, 'Oshiri' breaks top 10". Tokyograph. 2007-09-18. Retrieved 2007-11-25.
  6. ^ "NHK announces more "Oshiri Kajiri Mushi"". Tokyograph. 2007-11-08. Retrieved 2007-11-25.
  7. ^ "Psychedelic Afternoon | UrumaDelvi Deluxe". Retrieved 2015-08-23.
  8. ^ "Zapuni | 311 Japan Earthquake Charity Project". Archived from the original on 2015-09-06. Retrieved 2015-08-23.