Diva is a sub-unit of the all-female Japanese pop group AKB48

AKB48

AKB48 is a Japanese female idol group produced by Yasushi Akimoto.The group has achieved enormous popularity in Japan. Its ten latest consecutive singles topped the Oricon Weekly Singles Chart...

.

Debut

The formation of Diva was announced to Sayaka Akimoto

Sayaka Akimoto

, is a member of the Japanese idol group AKB48. She is captain of Team K and also a member of the sub-unit group Diva. She was born to a Japanese father and a Filipina mother.- Singles :as AKB48* BINGO!* Baby! Baby! Baby!* RIVER* Included in **...

 and Sae Miyazawa

Sae Miyazawa

, is a member of the Japanese idol group AKB48. She has been part of the "Senbatsu" group in the all singles except "Chance no Junban", released as AKB48. She is one of three members of Chocolove from AKB48, which became defunct after Rina Nakanishi's graduation from AKB48...

 on January 10, 2011, and disclosed to public by the all Diva members at AKB48 Theater on February 27, 2011, on the same day Akimoto finished the Tokyo Marathon

Tokyo Marathon

The Tokyo International Marathon was a marathon for male elite runners held in Tokyo, Japan, from 1980 until 2006.It actually consisted of two marathons - the Tokyo International Marathon which took place on even years, and Tokyo-New York Friendship International Marathon which took place on odd...

, and was notified by Yasushi Akimoto

Yasushi Akimoto

is a Japanese television writer, lyricist, record producer, professor and vice president at Kyoto University of Art and Design. He also created some of Japan's top idol groups, Onyanko Club and the AKB48 franchise.- Career :...

, who is also the producer of AKB48, to be reinstated as the captain of Team K. The concept of the unit is "The first-ever Dance & Vocal Unit from AKB48". They originally scheduled to release their debut single on April 27, 2011. But on April 1, it was announced that the release date has postponed to May 18 due to the aftermath of the 2011 Tōhoku earthquake and tsunami

Aftermath of the 2011 Tōhoku earthquake and tsunami

The aftermath of the 2011 Tōhoku earthquake and tsunami included both a humanitarian crisis and massive economic impacts. The tsunami created over 300,000 refugees in the Tōhoku region, and resulted in shortages of food, water, shelter, medicine and fuel for survivors...

. The A-side song, , is written by Akimoto, as well as some B-side songs including AKB48 Team-K's theater-performed song "Blue Rose", and one of the songs recorded on Type-B CD, , is written by Tetsuya Komuro

Tetsuya Komuro

, also known as TK, is a Japanese keyboardist, guitarist, singer, songwriter and music producer born on November 27, 1958 in Fuchu, Tokyo, Japan. He is recognized as being the most successful producer in Japanese music history and introduced dance music to the Japanese mainstream...

.

They performed publicly at the "Kobe Collection

Kobe Collection

The is a fashion event that has been held in Kobe, Japan and other cities during spring and autumn every year since 2002; over 30 brands have participated...

 in Shanghai

Shanghai

Shanghai is the largest city by population in China and the largest city proper in the world. It is one of the four province-level municipalities in the People's Republic of China, with a total population of over 23 million as of 2010...

" on April 16, 2011, first time after the formation of the group has announced.

Singles

• [2011.05.18] Tsuki no Uragawa
  Tsuki no Uragawa
  "Tsuki no Uragawa" is the debut single released by DiVA. The single was certified in May 2011 by the RIAJ as gold for physical copies shipped.-Information:...
  
   (月の裏側; The Other Side of the Moon)
• [2011.08.10] Cry