Hattori Hanzō
Hattori Hanzō (服部 半蔵, ~1542– November 4, 1596), also known as Hattori Masanari (服部 正成), was a famous samurai of the Sengoku era, credited with saving the life of Tokugawa Ieyasu and then helping him to become the ruler of united Japan. Today, he is often a subject of varied portrayal in modern popular culture.
Biography
Born the son of Hattori Hanzō Yasunaga, a minor samurai in the service of the Matsudaira (later Tokugawa) clan. He would later earn the nickname Oni no Hanzō (鬼の半蔵?, Demon Hanzō)
because of the fearless tactics he displayed in his operations; this is to distinguish him from Watanabe Hanzo (Watanabe Moritsuna), who is nicknamed Yari no Hanzō (槍の半蔵, Spear Hanzō).
Though Hanzō was born and raised in Iga, Mikawa Province (now Iga-chō, Okazaki, Aichi), he often returned to Iga Province, home of the Hattori family. He fought his first battle at the age of 16 (a night-time attack on Udo Castle)made a successful hostage rescue of Tokagawa's daughters in Kaminogō Castle in 1562 and went on to lay siege to Kakegawa Castle in 1569. He served with distinction at the battles of Anegawa (1570) and Mikatagahara (1572).