|Notes=Uses 2x [[Type 91 Armor-Piercing (AP) Shell]] for improvement up to ★+6<br>Uses 1x [[Type 1 Armor-Piercing (AP) Shell]] for improvement past ★+6<br>Uses 2x [[Type 1 Armor-Piercing (AP) Shell]], 2x [[New Model Gun Development Material]] and 1x [[Action Report]] for upgrade to [[Type 1 Armor-Piercing (AP) Shell Kai]] | |Notes=Uses 2x [[Type 91 Armor-Piercing (AP) Shell]] for improvement up to ★+6<br>Uses 1x [[Type 1 Armor-Piercing (AP) Shell]] for improvement past ★+6<br>Uses 2x [[Type 1 Armor-Piercing (AP) Shell]], 2x [[New Model Gun Development Material]] and 1x [[Action Report]] for upgrade to [[Type 1 Armor-Piercing (AP) Shell Kai]] |