Volume 15

This is the fifteenth volume of the Orient manga series.

Synopsis
The Obsidian Eight waged an all-out war against the "Five Grand Generals. Among them there is a former comrade, Katsumi Amako! In order to save Katsumi, Musashi and his friends, after arriving to Shirojishi Castle, learned that "Black Swords" forged from the Kitetsu of the Black Kishin may be the key to fight the Obsidian Eight. What did Musashi and Kojiro see when they entered the body of the Black Kishin to extract the Kitetsu they need...? The two boys' fates are now set in a dramatic motion!!

Chapters

 * 122. Crystals of Darkness
 * 123. Jisai and Kojiro (と)
 * 124. The Great King (の)
 * 125. Bloodlust

Volume's Extras

 * Bonus Chapter 1: The Different Ways of Bushido (ののいで)
 * Bonus Chapter 2: The Story of the Color of the Hair (のの)
 * The Illustration on the back cover is the one from Chapter 114 color spread.