Hiroe Nakai (?? ??, Nakai Hiroe) (born June 24, 1969 in Wakkanai, Hokkaido) is a Japanese women's professional shogi player ranked 6-dan.
She is a former women's shogi professional major title holder, having won 19 major titles throughout her career, and has been awarded the lifetime title of Queen Meijin, and also was the first women's professional to beat a regular shogi professional in an official game, the first women's professional to win an official game against a Class A professional, and the first women's professional to win a game in the NHK Cup TV Shogi Tournament.
Nakai also is a former representative director of the The Ladies Professional Shogi-player's Association of Japan (LPSA).