No remnants aroud here.
Why are you interested in Ikko Ikki?
-religious
We have 120 million population.
According to the national census(2015)
Shinto 107 million.
Buddhist 89 million.
Christian 3 million.
etc 10 million.
As you noticed, grand total is over actual population.lol
Most of people join more than 2 religion at the same time!
They have Shinto style wedding but their funerals are Buddhism style.
BUT when government investigater ask Japanese people "are you consider yourself as religious person?"
80 percent of them said "NO"
....maybe you cant understand us.I cant either lol.
Shinto is Japanese old...religion kind of thing.
But I think its more like aminism thing than monotheism.
Because we have countless gods in Shinto.
Ama-terasu the Goddess of the sun.(Do you know Amaterasu the dog from PS2 game "Okami"? she is the one)
Susano-o the God of wind and steel.
etc etc...
Similar to Greece mythology.
Incidentally, the emperor is the highest priest of Shinto.
And Reimu from "Toho project"is a shrine maiden of Shinto.
Many characters from Eroge or anime or Manga is related to Shinto.