I'm being a bit pedantic but in English the first phrase is not
If I was rich I would go to Japan
that grammar is incorrect because it's conditional and it should be
If I were rich I would go to Japan
I'm being a bit pedantic but in English the first phrase is not
If I was rich I would go to Japan
that grammar is incorrect because it's conditional and it should be
If I were rich I would go to Japan
Being even more pedantic I think you mean the first verb, were, is in the subjunctive.
it is a hypothetical situation.
Don't have an account yet? Join today
Test your French to the CEFR standard
Find your French level