Two years after the events of the first movie. The men and women of Division 2 have mostly moved on with their lives. But sinister forces working behind the scenes are attempting to bring down the government. A group called 'The Defence family' are seeking to draw attention to the lack of preparation that Japan would have in any future war. The group are staging violent attacks that shock Tokyo.
Captains Gotoh and Nagumo, are drawn in by military intelligence officer Shigeki Arakawa, to conduct an investigation and bring the culprits to justice. But Nagumo finds herself facing a person she thought she would never see again...
As the stakes rise, the former members of Division 2 must reunite to stop the terrorists and the chaos that has ensnared Tokyo.
The movie provides examples of the following tropes:
- Absurdly-Spacious Sewer: The climax of the second movie takes place in an aqueduct big enough for Second Section's Ingrams to walk upright inside it, and is almost wide enough for two of them to stand side by side.
- Battle Discretion Shot: In Patlabor 2, after shooting their way past the robot tanks in the tunnels, Nagumo enters an elevator in her labor only to find another robot tank about to open fire at point-blank range. Nagumo charges towards it screaming, "GET OUT OF MY WAY!" Cut to the elevator rising to the surface carrying Nagumo's totaled labor, whereupon she hits the eject and walks the rest of the way.
- Bittersweet Ending: Good grief is it! Nagumo stops Tsuge, the only man she has ever loved from his attacks. But he will spend the rest of his life behind bars. Countless people have died, and the shockwaves will affect the Japanese Government for decades. Goto's love will remain unrequited, and Division 2 will more than likely not work together again.
- Bring the Anchor Along: Detective Matsui is caught snooping around the disguised base of the conspirators, so they knock him out and leave him handcuffed to a pipe while they carry out their plan. He wakes up to see their airships taking off; desperate to get to a phone, Matsui just detaches the pipe and carries it with him. The pipe comes in handy for forcibly stopping a passing car so he can use its carphone.
- The Chessmaster: Yukihito Tsuge, the stoic Big Bad of the second film, fits this quite succinctly, driving Tokyo to the brink of civil war while never once getting his hands dirty himself.
- Cool Plane: The fictional AH-88 Hellhound actually out-cools most of the Humongous Mecha.
- Darker and Edgier: A Tom Clancy thriller as an anime.note A cabal of JSDF personnel, defense contractors and other conspirators attempt to bring down the Japanese government.
- Decon-Recon Switch: In the second movie, any time Labors go up against war machines like tanks and helicopters, they get annihilated due to the factors of superior firepower vs. light armor. However, the movie still ends with a mecha battle between bipedal bots and spider tanks.
- Eagle Land: It's mentioned that the U.S. has threatened to take military action and deploy USFJ troops if the Japanese can't get their house in order.
- Gatling Good: The AH88 Hellhound helicopters, Extor battle robots, & AL-97B Hannibal labors in the movies are all armed with 20mm rotary cannons. A JSDF helicopter flying over Tokyo can also be seen fitted with a three-barreled door-mounted machine gun.
- Giant Wall of Watery Doom: Izumi barely escapes one of these in the second movie when the tunnel the protagonists are fighting in is flooded.
- Rousseau Was Right: Nowhere does this shine through more than the second movie, where the Greater Tokyo Area being put under martial law by the Japanese Defense Agency amounts to little more than a minor inconvenience for both the civilians and the bored and put-upon JGSDF soldiers, who uncomplainingly humor onlookers who want to take pictures with their tanks.
- Shooting Gallery: Otah gets chewed out for not only shooting an automated target, but charging in to smash it up with his baton afterwards, destroying an expensive piece of equipment.
- Surprisingly Realistic Outcome: The members of division 2 can't remain a Ragtag Bunch of Misfits forever. By the second film Noa Izumi and Asuma Shinohara are now testing new Labors at a facility run by the Metropolitan Police. Isao Ota is a police academy Labor instructor. Mikiyasu Shinshi has since been reassigned as the Tokyo Metropolitan Police's head of General Affairs.Goto and Nagumo remain though. Having displeased their higher-ranking superiors.
- When the JSDF rolls into Tokyo to enforce martial law. The initial effect is shock and awe on the inhabitants of the city. But it then quietly descends into a mundane garrison duty, as we see bored soldiers on sentry duty.
- Throw-Away Country: Could be averted. According to an interview with the production crew, the country that shows up in the prologue of the second movie has background references to suggest that it can be Cambodia. Which does lead to Truth in Television since Japanese soldiers and police officers were deployed in Cambodia, years after the end of the Second Pacific War as UN-mandated personnel.
- Trial by Friendly Fire: A pair of JASDF interceptors very nearly fired on allied aircraft over Tokyo, due to hacking of Japan's air defense network thanks to Tsuge's hackers.