Unlock the following items by performing the corresponding tasks:

ITEM - HOW TO UNLOCK
Art of Explosives - In Chapter 2 - In Battle of Luoyang, Dong Zhuo, get 1,000 K.O.s.
Art of Medicine - In Chapter 2 - In Battle of Sekigahara, Mori Ranmaru, get 1,000 K.O.s.
Art of War - In Chapter 3 - In Battle of Shizugatake, Zhen Ji, Lu Bu or Inahime, get 1,500 K.O.s.
Balancing Kimono - In Chapter 2 - In Battle of Anegawa, Huang Zhong or Guo Huai, get 2,000 K.O.s.
Bear Saddle - In Chapter 3 - In Battle of Yamazaki, Zhang He, get 1,000 K.O.s.
Datto Kyahan - In Chapter 3 - In Battle of Yohei Seki, Na Zha or Diao Chan, get 1,000 K.O.s.
Elephant Saddle - In Chapter 3 - In Battle of Hu Lao Gate, Achilles, get 1,500 K.O.s.
Heavenly Robe - In Chapter 1 - In Battle of Shou Chun, Zhang Liao, get 1,000 K.O.s.
Ironclad Tekko - In Chapter 1 - In Battle of Nagashino, Zhou Tai, get 1,000 K.O.s.
Kattan magatama - In Chapter 1 - In Battle of Dong Kou, Sun Wukong, get 1,500 K.O.s.
Kongo Tekko - In Chapter 2 - In Battle of Kyushu, Sun Shang Xiang, get 1,500 K.O.s.
Matsukaze Saddle - In Chapter 3 - In Battle of Honnoji, Ayane, get 1,500 K.O.s.
Musou Armor - In Chapter 1 - In Battle of Odawara Castle, Wang Yuanji, get 1,500 K.O.s.
Musou Kote - In Chapter 2 - In Battle of Xuchang, Sanzo Hoshi, get 1,000 K.O.s.
Red Hare Saddle - In Chapter 3 - In Battle of Fancheng, Xu Huang, Wang Yi or Jeanne d'Arc, get 1,500 K.O.s.
Seven Star Band - In Chapter 3 - In Battle of Nagasaka, Xiao Qiao, Ryu Hayabusa or Bao Sanniang, get 1,000 K.O.s.
Shadow Armor - In Chapter 1 - In Battle of Ueda Castle, Nobunaga Oda, get 1,500 K.O.s.
String of beads - In Chapter 1 - In Battle of Yi Ling, Da Ji or Keiji Maeda, get 2,000 K.O.s.
Tough Armor - In Chapter 3 - In Battle of Tong Gate, Mori Motonari, get 1,000 K.O.s.
Vampire Kote - In Chapter 2 - In Battle of Mount Ding Jun, Nohime, get 1,500 K.O.s.
Yasha Mask - In Chapter 2 - In Battle of Nan Zhong, Xiahou Ba, get 1,500 K.O.s.
Yata Mirror - In Chapter 2 - In Battle of Hasedo, Kunoichi, get 2,000 K.O.s.