Japan is also already in the world's largest free trade agreement with the EU[0] and in a joint development program for a next generation fighter plane with Italy and the UK[1].

The US has squandered a massive amount of goodwill since the first Trump presidency.

[0] https://en.wikipedia.org/wiki/Japan%E2%80%93European_Union_C...

[1] https://en.wikipedia.org/wiki/Global_Combat_Air_Programme