2000年より国内外で演奏、研鑚を積む。08年「Cembalism」の録音に参加、翌年ＮＨＫ‐ＦＭに収録曲で生出演。同年「ソナール・カンタンド」での公演が月刊「音楽の友」誌にて『国内の年間コンサートベスト10』に選ばれ、2010，12年ブレーシャ国際音楽祭に招聘され演奏。12年よりピアソラ5重奏団を複数主宰。13年より鍵盤奏者の杉本周介と八ヶ岳を拠点に古楽プロジェクトを定期的に発信。14年「ソナ・カン」の初アルバム『ケルティック・バロック』をリリース。2015、17年『コントラポントのヴェスプロ』の収録に参加。2016年より横浜市、川崎市の事業を中心に室内楽シリーズ『楽壇の巨匠たち』を企画、発信。2019年、宗教曲として初の主催公演『Membra Jesu Nostri』を静岡音楽館AOIで手掛ける。ルネサンス?現代のジャンルを超越した奏法を実践する傍ら、幼児教育から多数のオーケストラの指揮、指導を続ける。

He recorded an album call “Cembalism! : An adventure of Cembalo” with harpsichordist Yoko Mori and percussionist Yoichi Odagiri in 2008. Later, he performed the pieces from the album live on NHK-FM. Following year, a concert by Sonar Cantando was selected as one of the “ 10 Best Concerts of the Year” by Ongaku-no-Tomo Magazine. In 2010 and 2012, they were invited to perform at Brescia International Music Festival. They also performed all Bach program at Saint Agata Church in Cremona, Italy where Antonio Stradivari was married.

In 2012, he formed Piasola Quintet. Since 2013, he has been performing with keyboardist Syusuke Sugimoto at Period Instrument Project in Yatsugatake. In 2014, Sonar Cantando released their first album “Celtic Baroque”. In 2015 and 2017, with Contraponto, Mr. Tanazawa recorded Claudio Monteverdi's Vespro Della Beata Vergine which the 4k video of the performance has been aired by Ottava. From 2016, he started chamber series “The Great Masters of the Musical World”.

He is at home with wide repertoire range from Renaissance to Contemporary works. He teaches young musicians, and also coaches and conducts orchestras as well.