Just because you live in Japan does not mean what you believe is correct. It is a religion by definition of what a religion is not by practice. I agree, that currently most people in Japan specially in urban locations do not consider Shinto as their faith and based on Japanese history and Buddhist influence, many of the practices and deities have been merged.
The way you are stating is as a matter of fact is bit tactless to people who consider this as faith. The very reason several shrines have gone to disrepair (some discontinued) is due to the fact that the following has decreased throughout the decade. Heck, Shintoism has been in decline since the Sengoku period and further more after WWII.
To put it simply, religion in its broadest sense means the belief in the existence of a god or gods, and the activities that are connected with the worship of them, or in the teachings of a spiritual leader. Shinto priests exists to this day and they still maintain the shrines and perform festivals related to their respective deities.
FYI, The Ise Grand Shrine to Amatersu is the the most important religious site for Shintoism, and the closest they have to a "Bible" is the Kojiki. Though yes, some practitioners consider it as a way of life but then again, so is Buddhism.
Another definition of religion is a particular interest or influence that is very important in your life. Which is to say justifies it as a religion even by way of life.
In fact, the worship if one's self or narcissism is a religion in it of itself.
You do realize that paganism,(worship of the elements, the seasons, animals, etc.) does not have any central text nor single religious site.
Narrow-mindedness is the bane of writers, I'd suggest to look things up before claiming 100% of anything. Also, most people is not 100%.