Do any Japanese car repair shops work on these models?
Yes, but with 2020 model anything done by a non-authorized service shop may void your warranty.
In case you find it interesting, American Honda designed and engineered the 2020 Accord Hybrid in America. It is build in Ohio by Americans and Honda makes more automobile engines and transmissions in America than it does vehicles. American Honda is a public company traded on the new York Stock Exchange. HMC are its trade initials.