This is "The Mystery of the Black Hand: Ryoma's Black Hand" by Shoichi Kaji. A historical mystery. Price: 667 yen + tax In good condition. Please consider this item, understanding that it is a used item. <Ryoma Assassinated! The Last Letter Before Death -- / Deciphering the "Ryoma's Cipher"! The Assassin is This Man / On the night of December 10, 1867, Ryoma Sakamoto was assassinated. It is said that the assassins were either the Shinsengumi or the Kyoto Mimawarigumi. However, there are too many contradictions and mysteries. Who is the real culprit? The "Ryoma's Letter" emerges -- By deciphering the "cipher" contained in the last letter Ryoma wrote just before his death, who had acted with the shogunate official Kaishu Katsu and the British arms merchant Glover, this book reveals the assassin of Ryoma, and furthermore, the truth of the end of the Edo period and the Meiji Restoration, a shocking book! Long-awaited paperback edition. (Revised title of the original book, "Ryoma Manipulated") 1