Zanseiken

 is a sword wielded by the Dog-hanyō Towa Higurashi. She will acquire the sword in The Second Act of Hanyō no Yashahime.

Physical Description
The Zanseiken has a gold guard in a style similar to that of Kirinmaru's armor with a deep blue jewel embedded in it.

Powers & Abilities

 * Enhanced Slashing: As it is empowered by Towa's demonic energy, its ability to slice through solid objects is more effective.
 * From the tip of her energy blade, Towa can unleash a powerful demonic energy wave in the form of a colossal blue-white dragon, just like her father had originally with Tōkijin, now with Tenseiga.
 * A stronger and more effective technique used by Towa, Kirinmaru was the one whom gave it the name.

Trivia

 * The Zanseiken was teased at the end of the first season finale.
 * The blue stone looks reminiscent of the blue Rainbow Pearl.