Debuted as an AV actress in 2015 under the name Kurumi Kashiwagi (柏木胡桃), after graduating from high school.
She then took a leave of absence and she returned to AV under the stage name "Maria Nagai".
She's half-Japanese and half-Filipino.
In 2017 she started training during the holidays and became a finalist in the hips division of the fitness competition.
She loves fascinating muscles like bodybuilders. Her ideal man is one with thick chest and shoulders.
In January 2021, she won first place in the Geo TV Adult News Media MANGO Big Breasts AV Actress Ranking.