although now a visa is no longer needed, but upon arrival at the immigration checkpoint, do we need to show proof to them the amount of cash, bank statements, etc, to proof that we do not go there for "jump aeroplane"?

I already book the flight. Fly to Kansai is expensive compare to fly to Tokyo. Should I go to Tokyo first then Hakone then follow by Osaka? Last day travel back to Tokyo again for the flight back to kl