Ikai: the invisible world on the other side of the world we live in.
In the past, people feared and respected beings beyond human understanding and created a world called Ikai, the Otherworld.
This book will explain the culture, traditions, and societies that people have built through the Ikai.
What are the "Kekkai" (wards) that stretch around the shrine?
Was northeast the path of demons?
Was sumo wrestling a ritual to ward off evil?
We will unravel the "Ikai" from the perspective of history and traditional folk beliefs that have been passed down in Japan from the distant past.
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