- Ame no Mori Kawa Umi
- Hello! Project "ONLY YOU" Audition Winners
BEYOOOOONDS was revealed on October 19, 2018 through a special Hello! Station webshow upload. Within the video, it was announced that BEYOOOOONDS would be a united group consisting of two newly formed units CHICA#TETSU and Ame no Mori Kawa Umi, and the winners of the 2018 "Hello! Project "ONLY YOU" Audition".
The name of the group originates from the English word "beyond" and the meaning "to the other side of". The name was chosen with the feeling of them changing shape and growing freely into the future.
BEYOOOOONDS major debut was revealed on April 30, 2019 in a surprise announcement during the first show of the "BEYOOOOONDS Ouen Kikaku FC Event 2019 ~Banshun no Jin ZIN~", with a release date of August 7, 2019. The group's first studio album was announced the following month on September 11 through episode #306 of the Hello! Station webshow, to be released on November 27.
- [2019.11.27] BEYOOOOOND1St
- [2019.05.29] Engeki Joshi-bu "Fushigi no Kuni no Alice-tachi" Original Soundtrack (演劇女子部「不思議の国のアリスたち」オリジナルサウンドトラック)
- [2019.08.07] Megane no Otoko no Ko / Nippon no D・N・A! / Go Waist (眼鏡の男の子 / ニッポンのD・N・A!)
-  The 61st Japan Record Awards 2019 "New Artist"
-  The 61st Japan Record Awards 2019 "Best New Artist"