There are several vehicles (all Japanese) and other military equipment collected together and displayed at the American Memorial Park in an area called "Tank Plaza" (there are two Type 97 Chi-has, an engine from a Zero, an anti-tank gun, an anti-aircraftgun, and a torpedo on display). No plaques or anything else to describe them.
Along the roads here and there you can see Japanese tanks (mostly Type 97s and 95s), which are usually up on concrete with small plaques identifying the vehicle.
Throughout the island are the remnants of the Japanese occupation, like tunnels, bunkers, ammunition magazines, and military buildings. Some are marked, others are neglected crumbling ruins.
The most poignant scene is the Sherman I mentioned. It's sunk up to the turret, about a hundred yards offshore. I would like to know more about what happened to that particular vehicle. The tourguide said it simply broke down in the water after having disembarked from a landing craft, and was not lost in combat. Can't imagine why they just left it there. Quite a few rusted remains of LVTs, too.
Just offshore from our hotel was the half-sunken hulk of a Japanese destoyer.
The reminders of the war are everywhere on Saipan. It really makes you think, lying on those beautiful beaches, what a hell it was all those years ago.