Rock A Japonica (ロッカジャポニカ, Rokka Japonika, stylized in English as ROCK A JAPONICA) is a Japanese girl idol group managed by Stardust Promotion.

It was formed in 2015 with five members from 3B Junior (out of 26 in total): Ami Uchiyama, Luna Naitō, Ruka Shiina, Chiho Takai, and Misato Hirase.

[1][2] The name of the group implies their intention to "rock Japan" (to shake it, impress, get it going).

[1] The group was dissolved on April 29, 2019, but will have one more performance during the "EVIL A LIVE 2019" festival.

[3] The 3 remaining members came back with the new unit B.O.L.T on April 15, 2019