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 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.