[2] He is a former Meijin, Tenth Dan, Ōi, Kiō and Ōshō major title holder.

[3][a] Since his given name is written using with the kanji characters for the numbers "one","two" and "three",[b] Katō is known to his fans by the nickname "Hifumin" (ひふみん).

[6] Additionally, the Katō variation (加藤流 katō-ryū) of the Double Fortress opening is named after him.

[8] In addition to major titles, Katō won twenty-three other shogi championships during his career.

Katō has received numerous awards and honors throughout his career for his accomplishments in both on an off the shogi board.