Sandaime Mune no Tanima ni Umore Tai

 (三代目胸の谷間にうもれ隊) was an idol unit. They debuted on April 25, 2011 under the name Mune no Tanima ni Umore Tai (胸の谷間にうもれ隊).

On August 7, 2011, they changed their name to Mune no Tanima ni Umore Tai X (胸の谷間にうもれ隊X) with the addition of Nagaoka Miwa and Kuroda Mayuka.

They changed their name again to Sandaime Mune no Tanima ni Umore Tai on April 20, 2013 with the addition of Houjou Mami.

Current Members

 * Houjou Mami (北條まみ) (Joined April 20, 2013)
 * Nagaoka Miwa (長岡美和) (Joined August 7, 2011)
 * Kuroda Mayuka (黒田万結花) (Joined August 7, 2011)

Former Members

 * Sukegawa Maria (助川まりえ) (Founding member; left March 27, 2011)
 * Tachibana Olive (橘オリーブ) (Founding member; graduated July 3, 2011)
 * Yosaka Yui (與坂唯) (Founding member; left August 4, 2012)

Singles

 * [2010.05.26] Sukebe! / Namagoroshi (スケベ!/生殺し)