Kigurumi became famous in 2006, after the two sung the CM song for a vastly effective Kewpie "Tarako" (cod egg) flavoured pasta sauce campaign. The song was so popular that the duo debuted under Victor Entertainment Inc. and released it as a single. The single was a major success, reaching #2 on the Oricon charts.
In February 2007 the duo returned with the song Minna de! Sansuu 99 Tai, released as a download only single, and in May released their second single Kurutto Mawatte Ikkaiten / Dancing Sister. Kurutto Mawatte Ikkaiten was used as the 9th ending theme song of the anime Keroro Gunsou, while Dancing Sister (a cover of The Nolans' hit song "I'm in the Mood for Dancing") was used as the theme song to the show "Mezamashi Doyoubi".
- [2006.09.06] Tarako Tarako Tarako (たらこ・たらこ・たらこ; Cod Egg, Cod Egg, Cod Egg)
- [2007.05.30] Kurutto Mawatte Ikkaiten / Dancing Sister (くるっと・まわって・いっかいてん/ダンシング・シスター; Turn Around Once)
- [2007.08.22] Hottottotto na Mainichi (ほっとっとっとなまいにち; Everyday Is Hottt) (Kigurumichiko)
- [2007.11.21] Tamagotchi (たまごっち)
- [2008.12.17] Tamagotchi Happy Version (たまごっち ハッピーヴァージョン)
- [2006.12.06] Tarako Tarako Tarako Tappuri Christmas BOX (たらこ・たらこ・たらこ たっぷりクリスマスＢＯＸ) (DVD+CD)
- [2007.02.21] Minna de! Sansuu 99 Tai (みんなで!さんすう 99隊;Let's Study Maths Together!)
- [2007.09.19] Tamagotchi (Rena Version) 1-ban (たまごっち（レナヴァージョン）1番)
- [2008.12.17] Winter Wonderland
- Official Website
- Kigurumi Special Website
- Victor Entertainment Inc,"Tarako Tarako Tarako" Website
- Kigurumichiko Special Website
- Q.P.Corporation "Tarako Kewpie"
- Japanese Wikipedia
- Oricon Profile
- "Sugar & Spice" (Rena's Office)
- "Carotte" (Haruka's Office)
- DOGATCH "Minna de Sansuu 99 Tai" Official Website