The Monster X Strikes Back/Attack the G8 Summit

All the world leaders have a meeting at the G8 Summit, but then a space-craft falls out of orbit and crashes in Japan. A spore was attached to the ship, and after being exposed to the Earth's atmosphere, it grows into the alien monster Guilala! It rampages through Japan as it makes its way to the G8 Summit. The President of the United States convinces the other world leaders to personally fight back instead of running away, and each country uses its own secret weapon against the monster. Meanwhile, two Japanese journalists learn of the legend of god Take-Majin, who must be awaken so he can save mankind from Guilala (in a Ultraman style battle).

I Wounder what or who Ultraman