You're also a Kaiju, none of the human race knowing of your existence hence you stay hidden in the mountains/earth.

Whilst slumbering, a large rumble from the weird place humans call "France", awakens you. Groggily from your disturbed nap, you rise to go see what it is all about.

Meanwhile, in France, Ultraman is on the Eifel Tower, holding the baby, Emi, who's wailing bitterly, as the villian, Dr. Onda, and his goons surround him in helicopters.