Patlabor: The Movie 2
The following weapons were used in the anime film Patlabor: The Movie 2:
At one point, Inspector Shinobu Nagumo goes to meet with her old mentor Yukihito Tsuge, who also happens to be the mastermind behind the chaos gripping Tokyo. As Nagumo prepares for the meeting, she takes a SIG P210-2 from the glove compartment of her car and later draws it on him when he flees, but can't bring herself to open fire.
JGSDF intelligence agents with the GSDF's Chief of Staff Special Intelligence Office are armed with what appears of be Colt-made M16A1s when they try to locate and arrest Tsuge in the Greater Tokyo Area.
Howa Type 64
Along with the Howa Type 89 rifles, at least one JGSDF soldier can be seen carrying an older Howa Type 64, which is sadly and ironically accurate since Type 64s still haven't been fully phased out and it is still being used by elements of all three branches of the SDF as of early 2010s, whereas the anime is set in the early 21st century.
Howa Type 89
The majority of the Japanese Ground Self-Defense Force (JGSDF) soldiers in the anime are seen armed with Howa Type 89 rifles. During a gas attack, one soldier panics and shoots out the window of a building with one trying to escape the approaching cloud.
As in the previous Patlabor movie, officers of the Special Vehicle Unit can be seen armed with Remington 870 shotguns. At one point, Asuma Shinohara uses one to fire a flare down a tunnel to blind a pair of remote-controlled robotic guns, though the plan backfires since most of the protagonists are blinded as well. Asuma and Mikiyasu Shinshi manage to flank the robots and use their shotguns to cut the control cables trailing behind the robots. Inspector Nagumo can also be seen with a Remington 870 when she confronts and arrests Tsuge at the end of the film.
General Dynamics GAU-19/A
During the montage showing the JGSDF's occupation of Tokyo after the declaration of martial law, one shot shows a weapon that appears to be a General Dynamics GAU-19/A door-mounted in a helicopter.
General Dynamics M197 Vulcan
The primary armament of the "Ixtl" battle robots and "AL-97B Hannibal" military Labors is the three barreled version of the M61, the M197 Vulcan. Hannibals are sometimes shown off-model with a round tip to their gatling gun, but all detail shots show a three-lobed clamp.
M242 Bushmaster chaingun
In the introduction, Tsuge's six-legged RADHA mech is equipped with what appears to be an M242 Bushmaster chaingun on the commander's turret.
While there is never a clear shot of their cannon farings, it can be assumed the the JASDF's F-15 S/MTD variants have M61 Vulcan 20mm cannons.
Oerlikon Contraves KBA
A Komatsu Type 87 reconnaisance vehicle in front of Misawa base is armed with a Oerlikon Contraves KBA auto cannon, licensed in Japan by Japan Steel Works.
Oerlikon Contraves KDE
During the sequence showing the JGSDF mobilization, several IFVs are seen. These are Mitsubishi Type 89 IFVs, equipped with an Oerlikon Contraves KDE 35mm autocannon.
JGSDF armored vehicles can be seen fitted with Sumitomo M2HB heavy machine guns, the licensed version of the Browning M2HB, as a secondary armament mounted atop the turret.
The JGSDF "Hellhound" attack helicopters mount an enormous four-barreled gatling gun under their nose that appears to be a Yakushev-Borzov Yak-B gatling gun, as mounted on the Mi-24 Hind. The version on the Hellhound is much larger, scaled up to at least 20mm. They were used by Tsuge's JGSDF-marked Hellhounds during attacks on critical Tokyo-based infrastructure, including an assault on SV2 Headquarters, in order to create panic.
During the introduction, a rebel group has a Russian 2S6 "Tunguska" self-propelled AA vehicle, which is repeatedly referred to as a tank and appears to be able to fire heat-seeking anti-tank missiles. Regardless of this strange behaviour, the Tunguska's two 2A38M autocannons are present and correct.
Heckler & Koch PSG-1
At one point in the film, the Tokyo Metropolitan Police Department attempts to disable a large blimp flying over the city that's sending out powerful jamming signals and disrupting all civilian and military communications, tasking a helicopter-borne sniper armed with a Heckler & Koch PSG-1 to shoot out the pod the signal's being sent from.
Second Section's "gentle giant," Hiromi, is issued this enormous overhead-magazine semi-automatic anti-Labor rifle; it appears to be fictional, though at least partially based on the Lahti L-39, and is clearly not the same rifle he was given in the first movie.
The Type 98 "Ingram" labors used by the SVU are armed with massive 37mm revolver cannons as their sidearms, their design drawing heavily from the four inch-barreled Colt Python revolver, but on a much larger scale. The weapon has the Colt logo on the grip replaced with the Chrysanthemum seal, which is the de-facto seal of the Japanese government and royal family, and is stored in a compartment in the labor's lower right leg when not in use. One drawback of the weapon is that the pilot has to exit the labor in order to manually reload it, spare rounds also being stored in the same leg compartment.
In addition to the revolver cannons mentioned above, the Type 98 labors can also use 90mm pump-action riot cannons which resemble massively scaled-up Remington 870 folding stock shotguns with high-capacity magazine tubes. These weapons are typically employed in situations where additional firepower is required, most notably during the tunnel battle near the end of the anime. Its folding stock design resembles the ones used by the Franchi SPAS-12.
During practice on a Labor-scale firing range in an old quarry, trainees under Ota's instruction are seen using a Labor-sized pistol, followed by Ota himself showing them how it's done. Unlike the revolver cannons used by the Labors in the field, the training pistol appears to be a magazine-fed, semi-automatic weapon with the magazine being loaded ahead of the trigger. It appears to be based on the "Obrez," a pistol-sized modification of the Mosin Nagant Rifle.