I have just sent an essay about Meiji Jingū to all my patrons (from my Patreon). Meiji Jingū is the largest and (probably) richest jinja in Tokyo, but it is 100 years old this year, making it a very young jinja, as well. It is the most popular site for hatsumōdë, with around three million visitors in the first three days of the New Year, but most people could not tell you which kami is enshrined there. The essay covers both the history and the current situation of the jinja.
I do intend to make this essay available on Amazon eventually, but it is likely to take some time. If you would like to get access to these essays earlier, and in multiple formats, then sign up for the Patreon.