Hello,
I apologize for the insufficient explanation. 
神門 is a cultural property designated by Hamamatsu City (heritage=7), but 上社 is not. 

Also, please check the definitions of these tags as well. You are the only person in Japan who uses "attraction=historic". 

Key: historic
https://wiki.openstreetmap.org/wiki/Key:historic

Tag:tourism=attraction
https://wiki.openstreetmap.org/wiki/Tag:tourism%3Dattraction

Key: attraction
https://wiki.openstreetmap.org/wiki/Key:attraction

"attraction=historic" in Japan
https://overpass-turbo.eu/s/1uk8