Protagonist: "A young woman with magical powers". How about a magically gifted [woman]? (A magically gifted [adjective/occupation]?)
Goal: To get documentary filmmakers to investigate supernatural events in a Japanese city??? This isn't really a compelling goal because there is nothing really relatable about it. Is this a Japanese found footage flick? I don't really understand what is going on here.
Antagonist: There is no antagonist, but the supernatural events could suggest an antagonistic man versus nature theme if this story is going for a supernatural/godlike take on nature.
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Questions to consider:
Who is this magically gifted woman?
Why does she feel the need to get documentary filmmakers to investigate supernatural events in Kamakura?
What has climate change go to do with supernatural events occurring in a Japanese city?
How does climate change destroy the balance between the real world and the fantastic world?
What is this fantastic world and exactly what are these supernatural events?