Others in the group include Yoshikazu Minami, Osamu Nakamura, Michio Takahashi, Yasuaki Tsukada, Hiroshi Kamiya, Masaki Izumi, and Yūji Yoda.

[5] Shima also won the now defunct All Star Kachinuki-sen [ja] 3 times (1982, 1985–86) for his only other shogi championships during his career.

[6] Shima has received a number awards and honors throughout his career for his accomplishments both on an off the shogi board.

[7][8] Shima has served on the Japan Shogi Association's board of directors on multiple occasions.

[11][12] He announced his resignation in January 2017 to accept responsibility for the association's handling of the 29th Ryūō challenger controversy.