Abcho

Abcho (typeset as ABCHO, meaning Abstract Chop), is a Japanese pop unit made up of two members from Japanese pop groups Morning Musume, their subgroup which includes Older/Graduated Members, Dream Morning Musume, and J-Pop Metal Group Hangry & Angry: Hitomi Yoshizawa and Rika Ishikawa. They formed in middle of February 2012, and released their first single on May 23, 2012.
History.
2008: Before Abcho.
Hitomi Yoshizawa and Rika Ishikawa were in another duo called Hangry & Angry.
2012-present: Formation and debut single.
In February 2012, Hitomi Yoshizawa and Rika Ishikawa announced that would form a new unit called Abcho. Abcho's first single was released on May 23, 2012. This was used as the opening theme song for "Sengoku Collection".