Born in Japan in 1988, Takanari Koyama began his studies in his hometown of Aichi with Hideki Hoshi. From 2008 onwards, he was a student of Josef Niederhammer and Werner Fleischmann at the University of Music and Performing Arts in Vienna and additionally he continued his study at Music School in Fiesole and at Accademia Stauffer with Alberto Bocini. He participated in the academy programme of the ORF Radio Symphony Orchestra and was an extra player in the Vienna Symphony. He also took part in masterclasses and private lessons with Jurek Dybał, Bogusław Furtok, Božo Paradžik, Dorin Marc, Wolfgang Güttler, Rinat Ibragimov and Sorin Orcinschi.

Since 2013, he has been Principal Bass player of the Göttingen Symphony Orchestra, which won an Echo Klassik Award in Hamburg in 2017. He has also collaborated as Principal Bass in the Orchestre de la Suisse Romande, Orchestre Philharmonique de Luxemboug, O/Modernt Chamber Orchestra, Beethoven Orchestra Bonn, Mozarteum Orchestra Salzburg, Royal Northern Sinfonia and Royal Philharmonic Orchestra.
Takanari Koyama won the prizes such as the Music Academy Compatition for Strings in Vienna in 2013 and the International Double Bass Competition in Wroclaw in 2014 and other national/international competitions.

He is a founder menber of TRIO KOYAMA with the violinist and his wife Marine Koyama and the violist Igor Tulchynsky.

Since 2017, Takanari Koyama has been teaching at the Mozarteum University in Salzburg.