Shin chan Me and the Professor on Summer Vacation The Endless Seven-Day Journey

Hiroshi has to travel to Kyushu to attend a business meeting, and so the Nohara entire family decided to spend time with Misae, Kumamoto, a childhood friend.
They reach Kumamoto Station, on their journey towards Assou. An unknown person offers them a camera , which is in strange state. The stranger asks witnesses.
Shinnosuke is able to enjoy the Assou Mountains and fields in the summer months while he has his camera by his side. The Assou landscape is even crawling with animals that he could otherwise never see in Kasukabe. And there are townspeople who are willing to assist and new acquaintances to meet.
That said…don’t the kids appear very much like one he grew up with?

Shinnosuke saw a massive creature with a silhouette silhouetted against the full moon during a crisp summer night. In front of the beast is a strange man with an enormous smile.
A similar man handed the camera to him at the police station…
and he refers to himself as the Professor Akuno. Assou has been witness to many weird events because of this confrontation.