I have a thing for police package cars, most car guys know about that Bluesmobile from the original Blues Brother's movie; the '74 Dodge Monaco with the "cop tires, cop shocks and cop motor, a 440 cubic inch plant, the model made before catylitic converters so it'll run on regular gas".
American police cars are for the most part, specialty cars built for law enforcement purposes. Take the Ford Crown Victoria Police Interceptor for example. While yes, it is based on your Grandma's Crown Victoria LX, the Police Interceptor has notable differences over the retail/rental LX. First, the frame features extra welding and braces and such to make it stronger (these cars were designed with extreme abuse in mind) and it does have specialized suspension components to aid in handling/ emergency avoidance/ abuse and the brakes are updated to stop on a dime. Also they do have special police "issue" tires and wheels.... usually steelies with minimal hubcap/ centercaps. The interiors are fairly spartan, usually no carpet, vinyl flooring like on an worktruck and special seats that have heavy duty covering and special bolstering and the seats have an "anti stab" panel inside so the officer can't get shanked from behind. Also a true police package car has a "Certified Calibration" speedometer that is accurate as possible and usually has a higher speed marked on it. Also in the Crown Vic's case it has more power over the "civie" Vic, the civilian Vic has a 4.6L SOHC V8 that is a single exhaust that produced 229 hp (yes, I know that's pretty pathetic) while the Interceptor has the same basic engine, but it produced 255 hp thanks to a special intake, dual exhaust with no resonators, it's own unique ECU tune, federal emission components, oil coolers, beefed up cooling system, special driveshaft and 2 axle ratio choices (those escape me at the moment) and these were fleet only, I wouldn't have been able to buy a new for myself.
My question is, are the Japanese police built/optioned the same way? Are there true Nissan Cedric/ Toyota Crown police package cars, or are they just normal cars pressed into police service? Is this also true of the "fast" Japanese police cars like the R34 GT-R's that do express way enforcement, or are those beasts as specialized as the 5.0 Mustangs that Highway Patrol agencies used back in the day?
I know this is unusual, but I've always been curious about this.