May Jamileh Hashimoto (橋本 芽生, Hashimoto Mei){Persian جمیله هاشیموتو}, better known by her stage name May J., is a Japanese pop and R&B singer who made her major label debut under Sony Music Japan on July 12, 2006, with her first mini-album All My Girls.

Believing she was American, she discovered her true heritage on a chance overhearing of a conversation between her mother and grandmother.

[1] During her formative middle school years she began listening to Iranian singers Googoosh and Afshin and has later said she hopes to debut in Iran.

While waiting to make her major label debut, May J. was a dancer for Aaron Carter's Japanese concert and was featured on the track Luyva: Another Episode from Sphere of Influence's album Big Deal, credited simply as May.

May J. was then featured on Hip-Hop artist Zeebra's new album World of Music on the track "Shinin' Like a Diamond".

On March 6, 2009, label Rhythm Zone opened a new official site for May J. confirming that she had left Sony to join the Avex imprint.

Her first solo live tour, lasting ten weeks and including 40 shows followed, culminating at Tokyo's Shibuya AX venue on May 23, 2010.

May J. sang the end roll version of the title song "Let It Go" in Disney's Japanese release of the Frozen animated movie which hit No.