Its name (お茶の間, in Kanji and Hiragana) means Japanese-style living room in Japanese.
Project group would be formed that year with the first members to join the line-up announced as Kirara Yonemura, Kanami Ishiguri, Nanami Kubota and Madoka Saito.
[1] On July 5, additional members of the group were announced as Natsume Nakayama, Ruli Hiromoto, Miku Nishizaki, and Momo Kitahara.
Project audition was held starting on July 20, in order to add more members to the group's line-up.
[3] On January 8, 2022, Ocha Norma digitally released their first song, "Ramen Daisuki Koizumi-san no Uta".