Nyoninzo
At least two Nyoninzō (女人像 Woman Statue) appear in the Hokuto no Ken universe. Both are mystical objects that hold the knowledge of the Hokuto Sōke and Hokuto Shin Ken from millennia past.
Souten no Ken
Inside the statue is a spire called the Tower of the Repose of Souls (鎮魂の塔 Chinkon no Tō). Inside of that is a magatama shaped like a Hebrew Yā ( י ).