Four Realms of Hakuda

The Four Realms of Hakuda (白打の四間, Hakuda no Shikan; literally "Four Spaces of the White Hits") denotes the sequence of progression in training within. Each of the four are extensively broad as they encompass the entirety of Hakuda's tenets and teachings. They are arranged in a series of succession, with the road to mastery defined as passing through the realms, but each realm contains nearly infinite degrees of substance that a martial artist must uncover, even as they pass on to the next realm. In truth, one never finishes their Hakuda training; the path before them is eternal.