"Busu ni Naranai Tetsugaku" (ブスにならない哲学, "The Philosophy of How Not to Become Ugly") is a 2011 song by Hello! Project Mobekimasu. The song is a collaboration between Hello! Project acts Morning Musume, Berryz Kobo, Cute, Erina Mano, and Smileage.^[2] The single was released on November 16, 2011^[2] on the label Zetima.

Quick Facts Single by Hello! Project Mobekimasu, B-side ...

"Busu ni Naranai Tetsugaku"
Regular Edition cover
Single by Hello! Project Mobekimasu
B-side	"Moshimo..." (Regular, Limited A) "Kacchoii Uta" (Limited B, C, D, E, F)
Released	November 16, 2011 (2011-11-16) (Japan)
Genre	J-pop pop
Label	Zetima
Songwriter(s)	Tsunku
Producer(s)	Tsunku
Morning Musume singles chronology
"Kono Chikyū no Heiwa o Honki de Negatterun Da yo! / Kare to Issho ni Omise ga Shitai!" (2011) "Busu ni Naranai Tetsugaku" (2011) "Pyoco Pyoco Ultra" (2012)
Berryz Kobo singles chronology
"Ā, Yo ga Akeru" (2011) "Busu ni Naranai Tetsugaku" (2011) "Be Genki (Naseba Naru!)" (2012)
Cute singles chronology
"Sekaiichi Happy na Onna no Ko" (2011) "Busu ni Naranai Tetsugaku" (2011) "Kimi wa Jitensha Watashi wa Densha de Kitaku" (2012)
Erina Mano singles chronology
"My Days for You" (2011) "Busu ni Naranai Tetsugaku" (2011) "Doki Doki Baby / Tasogare Kōsaten" (2012)
S/mileage singles chronology
"Tachiagirl" (2011) "Busu ni Naranai Tetsugaku" (2011) "Please Miniskirt Postwoman!" (2011)
Berryz Kobo×Cute singles chronology
"Amazuppai Haru ni Sakura Saku" (2011) "Busu ni Naranai Tetsugaku" (2011) "Chō Happy Song" (2012)
Music video
Busu ni Naranai Tetsugaku on YouTube

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• Morning Musume
• Berryz Kobo
• Cute
• Erina Mano
• S/mileage

The CD single was released in 7 versions: Regular Edition and Limited Editions A, B, C, D, E, and F. Limited Edition A included a bonus DVD containing a music video for the title song; all the other editions were CD-only.

The dance sequence appeared in the music video was choreographed by Lucky Ikeda.^[3]

Hotexpress' Tetsuo Hiraga noted that when watching the music video for the first time he had the impression the song was a declaration of war against other idol groups, particularly the current leader of the idol scene AKB48. The reviewer stated that the song was a characteristic of Tsunku mix of disco and pop. When listening to it, he was impressed with the pool of talent in Hello! Project, as each girl has her distinctive voice, look, and manner of expression.^[4]

All songs written and composed by Tsunku.