Hattori Masashige (服部 正重, 1580–1652) was an Edo period Ninja and the fourth Hattori Hanzō. His older brother was Hattori Masanari and his younger brother was the monk Hattori Masahiro. His wife was the daughter of Ōkubo Nagayasu.

Hattori Masashige
服部 正重
Leader of Iga Ninja
In office
1615–1652
Preceded byHattori Masanari
Personal details
Born1580
Died1652
Parent
RelativesHattori Masanari (brother)
Hattori Masahiro (brother)
Military service
Allegiance Tokugawa clan
Tokugawa Shogunate
Battles/warsBattle of Sekigahara
Osaka Campaign

He fought his first battle at 20 years old at the Battle of Sekigahara and went on to fight in the Siege of Osaka after his brothers death at Osaka he succeeded him and became leader of the Iga mono. He went on to serve the Tokugawa after they secured the shogunate.