Hattori Masanari

Who They Were

Hattori Masanari (服部正就, はっとり まさなり) was a samurai of the late Sengoku period, born in 1565 and killed on 3 June 1615. He was the eldest son of Hattori Hanzō, the retainer of Tokugawa Ieyasu whose name later became synonymous with the ninja of Japanese popular culture. Masanari inherited his father's position and his command over the Iga warriors, becoming the third man to bear the name Hattori Hanzō. His career was defined by that inheritance and by the difficulty of living up to it.

He was born in Eiroku 8 (永禄八年), the eighth year of the Eiroku era, a period of civil war in which the Tokugawa were still one ambitious clan among many. His mother was a daughter of Nagasaka Nobumasa, and his wife was named Matsudaira Matsuo (松平松尾). His son, Hattori Masatoki, and his brother, Hattori Masashige, both belonged to the same warrior house.

Life and Career

Masanari grew up inside the Hattori household at the moment its fortunes were rising with the Tokugawa. His father, Hattori Hanzō, had earned Ieyasu's trust through service in the Iga region, and the family's standing rested on that personal bond rather than on great landed wealth. By the mid-1590s Masanari was fighting alongside his father, learning the command of the small, mobile bands of Iga warriors that the Tokugawa used for scouting, raiding and guard duty.

When his father died in 1596, Masanari succeeded him at the age of thirty-one. He took over both the family headship and the leadership of the Iga band. The succession was not merely a matter of title: it placed him in charge of men who had served his father and who judged him against that memory.

After the Battle of Sekigahara in 1600, Tokugawa Ieyasu appointed Masanari captain of the guards of Edo Castle. This was a position of real trust, since Edo was the Tokugawa headquarters and would soon become the seat of government. The appointment, however, ended badly. The Iga band under his command rebelled against his treatment of them, an open humiliation in the eyes of the Tokugawa leadership. While pursuing two men who had fled, Masanari killed a man who turned out to be the wrong person, a case of mistaken identity. He was relieved of his post.

The loss of the Edo command damaged both his reputation and the standing of the Hattori name. Masanari's response was to seek restoration through combat. During the Siege of Osaka, the campaign of 1614–1615 in which the Tokugawa destroyed the last major opposition to their rule, he fought as head of sixty Iga ninja. He was killed during the second siege of Osaka, on 3 June 1615, the year the Toyotomi house fell and the long era of civil war came to an end. He was succeeded as head of the family by his brother, Hattori Masashige.

Why They Matter

Masanari's life is a case study in what happened to the specialist warrior houses of the Sengoku period once the wars stopped. The Hattori were not great lords; their value lay in a particular kind of service — intelligence, night operations, and the guarding of a lord's person — that the Tokugawa needed while they were fighting for supremacy. Masanari inherited that role at its height and lost it within a decade.

His humiliation over the Iga band is also a reminder that the famous "ninja" of the period were organised military units with real chains of command, not lone figures in black. The men under Masanari could and did refuse his authority, and their refusal carried political weight because it was visible to Ieyasu's government.

Finally, his death at Osaka places him at the exact close of the Sengoku period. He died in the same campaign that ended the last serious challenge to Tokugawa rule, fighting to restore a family name that had been damaged in peacetime service.

The Name in Japanese

The full name is written 服部正就. It is read はっとり まさなり in kana, and romanised as Hattori Masanari. The family name comes first, as is standard in Japanese.

服 (read はっ in this name) — the first character of 服部. On its own the character means "clothing" or "to wear", and it also carries the sense of submitting to or obeying. In the surname it functions as a fixed element rather than as a word with its everyday meaning.

部 (read とり in this name) — the second character of 服部. It originally referred to a division, section, or an organised group of workers attached to a court or clan. Combined with the first character, 服部 is an old occupational surname, traditionally associated with a guild of weavers or cloth-workers serving the Yamato court. The reading はっとり is irregular and must simply be learned; the characters do not sound out that way individually.

正 (read まさ in this name) — the first character of the given name. It means "correct", "right", or "proper", and it is a very common element in samurai male names, where it often signals rectitude or legitimacy.

就 (read なり in this name) — the second character of the given name. It means "to take up a position", "to assume", or "to accomplish". Paired with 正, the given name 正就 reads as something like "rightly assuming one's place" — an apt name for an eldest son expected to inherit his father's command.

The reading まさなり is a standard kun-reading combination for these two characters as a personal name. Note that the same characters could be read differently in other names, which is why Japanese personal names are always glossed with kana.

Legacy

Masanari is remembered chiefly through his father. Hattori Hanzō became, in the centuries after his death, the archetypal ninja of Japanese fiction, and the title "third Hattori Hanzō" that Masanari carried is now far better known than the man himself. In the popular imagination the Hanzō name is a single legendary figure rather than a line of three men who held it in succession.

His own record is a short one: succession in 1596, the Edo Castle command after 1600, its loss, and death at Osaka in 1615 at the age of fifty. What survives of his story is the pattern of it — a son handed a famous father's role, judged against that father, and given one final campaign in which to answer for the failure. He was succeeded by his brother Hattori Masashige, and the family continued, but the Iga command that had made the Hattori name did not pass to his son.