Tateoka Doshun[1] (楯岡の同人) was an intermediate-ranking Iga ninja during the Sengoku Period. He is also known as Igasaki Doshun[2] or Igasaki Dojun.[3]
In 1558, during the Siege of Sawayama, Tateoka Doshun and his 48 men (including four Koga ninja) entered the Sawayama Castle by the use of bakemono-jutsu (ghost technique) of making paper lanterns displaying the enemy's badge. Dressed as a samurai and carrying the lanterns, they walked in unchallenged, then set fire to the castle, allowing Rokkaku Yoshikata to make a successful assault.[1] The same technique was also used by Matsudaira clan during the Siege of Kaminojo in 1662.[2]There is a popular rumour concerning the death of Tateoka Doshun that Tokugawa Ieyasu had Doshun assassinated by Ninja leader and Samurai Hattori Hanzo during the battle of Komaki and Nagakute for giving infomation to the Toyotomi.