Studied at Kunitachi College and its post graduate course, and further studied opera at New National Theatre Opera Studio in the 6th graduating class. As a recipient of the grant by the Agency of Cultural Affair's Program of Overseas Study, Machi studied in Bologna, and later studied in Munich given scholarship by Rohm Music Foundation.
In operatic productions, Machi appeared numerous productions produced at Hyogo Performing Arts Center, including Madama Butterfly (2006), Tosca (2012), Il Barbiere di Siviglia (2013), Cosi fan tutte (2014), La traviata (2015), The marriage of Figaro (2017) and Der Freischütz (2018). Productions at Saito Kinen Festival Matsumoto and Seiji Oawa Matsumoto Fesival include Salome (2010), L'enfant et les sortilèges for Family Opera (2015), and Gianni Schicchi (2018). Machi also frequently appeared at Ozawa Seiji Ongaku Juku (Currently Music Academy), beginning with Madama Butterfly for special concert (2012), The Marriage of Figaro (2014), L'enfant et les sortilèges for family opera (2015), and Carmen (2017). At New National Theatre, Machi appeared varied productions, including The Merry Widow, (2009), Falstaff (title role in an Opera Studio production in 2010), Silence (2012), special production of Don Giovanni by then artistic director of the treatre, Tadaaki Otaka, and regular productions of the theatre, such as Don Giovanni (2014) Silence (2015), and The Magic Flute (2016). In 2019 he appeared Biwako Hall production of Siegfried.
He frequently performs with orchestras and conductors, and his performances garner critical acclaim, and gradually expanding the repertoire. His orchestral performances in recent years include his appearance at Tokyo Philharmonic Orchestra's subscription concert with conductor Andrea Battistoni, singing the role of Kyoto in Mascagni's Iris, and Carmen with NHK Symphony Orchestra conducted by Charles Dutoit.
This is his first appearance at PMF.