Born in Japan in 1988. He started his musical education at the age of 4 at the Yamaha Music School, at first as a pianist and later as a double bassist.

Takanari started playing the double bass in the wind orchestra at the age of 13 during his school days and played in various Ensembles with a great deal of passion, and when he was 17 he decided that he would become a professional musician. 

After a year of preparation, he passed the entrance exam at Aichi prefectural university of fine arts and music with Hideki Hoshi. After studying in Japan for two years, he moved to Vienna, Austria at the age of 19. He studied with Josef Niederhammer and Werner Fleischmann at the University of music and performing arts Vienna as well as at the Scuola di Musica di Fiesole with Alberto Bocini. While still a student, Koyama participated in the academy program of the ORF Vienna Radio Symphony Orchestra as well as being 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, Sorin Orcinschi and Rinat Ibragimov.

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 played as principal bassist in the Swedish O/Modernt Chamber Orchestra, Beethoven Orchestra Bonn, Mozarteum Orchestra Salzburg and Royal Northern Sinfonia.

Takanari Koyama won the First Prize at the Music Academy Competition for Strings in Vienna in 2013 and the Third Prize at the International Double Bass Competition in Wroclaw in 2014.

As a soloist, Takanari has performed in countries including Germany, Austria, France and Japan. He has given masterclasses at the SAOS summer academy in 2016, Salzburg and in 2018 gave also in Nagoya and Tokyo.

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