Mai Kokubo (Euphonium) is from Shizuoka, Japan and holds a Master of Music Degree in Euphonium Performance from University of North Texas where she studied under Dr.Brian Bowman from 2008-2010.
She also holds a bachelor degree from Kunitachi College of Music where she studied under Mr.Toru Miura from 2002-2006.

Mai placed 2nd at the 2012 Japan Wind and Percussion Competition (1st prize was not awarded), the finalist of ITEC 2010 Euphonium Artist division and Mock Band Euphonium division, and she won the 3rd place at the 2009 Leonard Falcone International Competition. Also, she got the 2nd prize in 2009, the 4th in 2007, the 4th in 2005 at the Japan Wind and Percussion Competition.

In 2020, Mai had her  solo recital at Tokyo Bunka Concert Hall where is one of best concert hall in Japan. She world premiered Hiroshi Hoshina's new pieces "Autumn Leaves" and Takashi Haga's Euphonium Concerto. She released her CD "A War in Wonderland" (2015), and "Miko Dance"(2020). 

As a Soloist, Mai has also been invited to appear as a guest artist at various esteemed music festivals including the International Tuba Euphonium Conference (ITEC) 2014 Indiana, 2016 Tennessee, 2019 Iowa  and 2023 Arizona in the U.S.
She chosen as a head judge of ITEC 2023 Euphonium Artist Division. Also, she was selected as a  Guest Artist of ITEC 2023 and performed "Miko Dance" by Hiroshi Hoshina with Salt River Brass Band which conducted by Hiroshi Hoshina. Moreover, Mai was invited as a Guest Artist of Falcone International Tuba and Euphonium Festival 2023 and The U.S. Army Tuba - Euphonium Work Shop 2024.

She currently teaches at Aichi University of the Arts, Senzoku Gakuen College of Music, Kinjyo Gakuin University, and Tokoha Gakuen Junior College, Kai Seika High School, and Hamamatsu Gakugei High School.