Tatekawa started his professional career in Japan's Top League playing for Kubota Spears in Chiba.[3] His impressive record made the former Australia national coach Eddie Jones recommend him to Brumbies' boss Stephen Larkham. The Brumbies were looking for new talent in the 10/12 area due to an injury to Christian Lealiifano and were happy to take him on as part of their development plan. The former Wallabies and Spears player Toutai Kefu sang Tatekawa's praises on signing for the Brumbies, saying he was the best Japanese player he had ever seen.[2]
International
Tatekawa made his international debut for the Brave Blossoms in an away match against Kazakhstan in April 2012. To date[when?] he has made 39 appearances and scored 59 points including seven tries.[4]