What exactly happened to Yuta Gamon?
While it's not clear what "wavelength" Yuta Gamon is on, his spirit is clearly still connected to the normal world. The final scene before the credits reveals that he's still posting on his blog, trying to earn affiliate money. I don't know if the static from the Sky Sensor means much, other than to suggest that it's still capable of connecting to the spirit wavelength, although his latest blog entry apparently has something to do with the device.

In addition, at the end of the credits, the live action shots of the pond being drained and the final brief scene showing a "Coldsleep Room" with the name Gamon Yuta on it suggests that his body has been recovered and has been cryogenically frozen. This would have put on hold the almost expired 9-minute limit on revival after death. I'm guessing they're hoping to make a sequel.