Ithaca M37

The Ithaca M37 is a pump action shotgun belonging to Rika Minami. It is primarily used by Takashi Komuro until he finds the Benelli M4 Super 90. Rika modified the Ithaca by attaching a dot sight.

Overview
''"Everything Kohta said in the story about this being a pump action shotgun and whatnot is all true, but whenever I think of the Ithaca M37 I just think of the American soldiers in Vietnam who would use the gun in place of a bong to smoke marijuana." ''-Daisuke Sato

Plot
The shotgun was part of Rika's locker of weapons. Kohta and Takashi break open the lockers, and find the weapons, including the shotgun. When rescuing Alice, Kohta is seen using it against the hoards of "them". After crossing the river, he gives it to Takashi, instructing him how to fire and reload. He uses it as his main arm until he finds the Benneli M4 Super 90 in the evidence locker.