Amaki Riona

 (天城りおな), formerly known as Hananoki Riona (花乃木りおな) and Tanioka Rumi (谷岡瑠美), is a Japanese idol, a former founding member of ♡'s（kyuuuns), a former 1.5th generation member of Boku wa Mada Shinanai, a former member of Sweet Surrender, and a former member of Kirameki☆Unforent.

She joined Sweet Surrender, under the name Tanioka Rumi, in April 2015 and left in January 2016.

She joined Kirameki☆Unforent, under the name Hananoki Riona, on March 13, 2016, and graduated on May 13, 2018.

She joined Boku wa Mada Shinanai on September 21, 2020, and graduated on October 31, 2021.

She withdrew from ♡'s（kyuuuns) on December 15, 2022.

Singles

 * Unmei√Big Bang / Genei★Galactica
 * =Nijiiro= Sunshine / Koukou◇Namida

Collaboration Singles

 * Yuki no Kakera*

Music Cards

 * =Nijiiro= Sunshine
 * Eien△Gravity
 * ☆Kousokutei☆-star ship-
 * Genei★Galactica / Ryuusei☆Romantica ver.2016
 * Shunkan, Floresent
 * Unmei√Big Bang
 * Taiyou✡INVADER
 * Kiseki≒Star Tune