Shin Godzilla is a creature that has been mutated because it was fed Nuclear Waste on 1950 which causes it's evolving and after years. It finally shows up to bring destruction and make people suffer just like how he suffered for making him.

After all, Shin Godzilla has achieved it's 4th Form known as Kamakura-san. Do something before it achieve it's 5th form and evolves to something powerful.

(He obviously cannot talk because he is an Kaiju. But maybe he can listen?)