Atsushi turned professional in 1999 and was promoted to 2 dan in the same year.
In 2004, Atsushi was awarded a prize for having the highest winning percentage among Japanese professionals.
In the same year he reached his 200th career win.
[1] Atsushi participated in the 10th Samsung Cup in 2005 as a Japan representative.
This biographical article relating to a Japanese Go figure is a stub.