A Familiar Name

They spoke openly but the other three could not hear what they were saying. This is simply because there is a mechanism around the chairs and the tables.

The chairs around the table is also magical in nature and is carved with intricate details.

The chair where Amaterasu is sitting is black in color and there are the carvings of all kinds of mythical Japanese gods and monsters on the chair back. 

The black color itself is magical as it seems to absorb light. Yomi, the name itself is Japanese word for the land of the dead or the World of Darkness. 

It is then the reason why all the high ranking members all have taken the name of mythological gods and deities.

Amaterasu, Susanoo and Tsukuyomi are the three leaders of the three Gates of Yomi.

And then there is the two founder of Yomi, the one who had subdued the criminal underworld of Japan and then expand its influence over the world

It is Izanami and Izanagi.