It's something the US has basically enforced, it's their excuse to things like military bases in Okinawa, which goes against Japan's ideas of not having an army (even though the JSDF has broken this promise of sorts). More military spending it's not going to bring any good to anyone, specially coming from Europe and its record, specially the Brits.

NATO members in general are too comfortable relying too much much on the U.S. defense umbrella. It is something the U.S. has been warning NATO members about for a long time. It's meant to be a collective defense. What's happening in Ukraine should be a loud wakeup call.
save