All weapons used by the LDF are known to be used/taken from JSDF stockpiles as "donated" by local governments to defend libraries against the Media Betterment Act (MBA).
Minebea P9
The main sidearm of the LDF is the Minebea P9, a licensed copy of the SIG-Sauer P220 manufactured by Minebea and Shin Chuo Kogo KK. LDF soldiers, including Iku Kasahara (Nana Eikura) and Captain Ryusuke Genda (Jun Hashimoto), wield these weapons.
For some reason, not enough Minebea M-9s were available for the LDF extras during production. The Micro Uzi was used as a stand in for the Minebea M-9 for some scenes. The folding stock appears to have been removed
Error creating thumbnail: File missingIMI Micro Uzi with folding stock - 9x19mmError creating thumbnail: File missingA Micro Uzi is seen behind a Minebea M-9. Note the 2 ribs on the receiver and the shape of the rear of the weapon. There is also a gap where the folding stock used to be.Error creating thumbnail: File missingAn LDF soldier is firing a Micro Uzi mocked-up as a Minebea M-9. Note the shape of the rear of the weapon, and the crude front grip. The longer barrel is missing the holes for the flash hider, indicating that this is a rubber stunt weapon.
Howa Type 64
The Howa Type 64 is used as a training rifle for all recruits prior to indoctrination into the LDF, most noticeably Hikaru Tezuka (Sota Fukushi) and Kasahara.
Error creating thumbnail: File missingNana Eikura firing an actual Type 64 loaded with live ammunition at JGSDF Camp Iruma during the filming of this scene. The JGSDF had loaned parts of the camp and vehicles for filming, as well as advisers and extras on the set
Howa Type 89
The Howa Type 89 is the main assault rifle of the LDF.
Error creating thumbnail: File missingHowa Type 89 - 5.56x45mmError creating thumbnail: File missingKasahara crawling under barbed wire with a Type 89.Error creating thumbnail: File missingDojo swaps his Minebea M-9 for a wounded LDF soldier's Type 89. Oddly enough, none of the LDF soldiers on the ground were seen using Type 89 rifles against the MBC.Error creating thumbnail: File missingAn LDF door gunner firing his Type 89 at advancing MBC forces below from a UH-60J Blackhawk (which was borrowed from the JGSDF during production). Note the brass being ejected.Error creating thumbnail: File missingCloseup of the LDF door gunner's Type 89. The muzzle flash and brass being ejected appear to be genuine, and not post-production CGI typical of Japanese films. It is possible that the door gunner was played by an actual JGSDF soldier.
Remington M24 Sniper Weapon System
The M24 Sniper Weapon System is the LDF's standard sniper rifle, and is equipped with a Harris bipod. It's possible that these weapons are airsoft replicas, since none are seen ejecting brass, and the muzzle flashes appear to be post-production CGI.
Error creating thumbnail: File missingM24 sniper rifle - 7.62x51mm NATOError creating thumbnail: File missingAn LDF sniper team takes position on a rooftop. The soldier in the center is carrying binoculars on a folded-up tripod, not a shotgun.Error creating thumbnail: File missingTezuka and other LDF snipers firing warning shots down below. The sniper on the left has lifted his M24 its perch after firing, instead of letting the bipod and his shoulder absorb all the recoil.Error creating thumbnail: File missingCloseup of Tezuka taking aim with his M24Error creating thumbnail: File missingView inside the scope. It appears that Tezuka hasn't properly adjusted his scope, since he has to aim off to the left to hit an MBC trooper in the leg (who is standing still!)Error creating thumbnail: File missingTezuka operating the bolt on his M24. Although the sound of a spent cartridge hitting the floor is heard, nothing is seen coming out.
M84 Stun Grenade
Dojo throws an M84 stun grenade into a room during a hostage rescue. It's surprising that the LDF never employ stun grenades during their battles with the MBC, despite their fighting doctrine and less-than-lethal nature.
One of two submachine guns of the MBC is the Heckler & Koch MP5A4. The MP5A4 supplements the more common MP5A5 fielded by the MBC. These weapons are occasionally seen outfitted with Surefire 628 forearms and, at least one is equipped with a tri-rail forend, though it doesn't have any attachments mounted to it.
The most common weapon seen in the hands of the MBC. Many are equipped with the Surefire 628 forearms and flashlights, and some have receiver-mounted rails. The Tokyo Marui MP5-J is the airsoft version of the Heckler & Koch MP5A5. It could be differentiated from a genuine MP5A5 by the shape of its unique flash hider, supposedly developed for Japanese law enforcement.
The Bakushukai leader, Kenji Takeyama (Kazuma Suzuki) uses the Heckler & Koch USP Compact as his personal weapon.
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Norinco Type 56
At least one Bakushukai Militant is seen wielding a Norinco Type 56 in the film's intro.