Watanabe no Tsuna

Who They Were

Watanabe no Tsuna (渡辺綱, わたなべ つな, Watanabe no Tsuna) was a samurai of the Heian period, the era that ran from 794 to 1185. He lived from 953 to 1025, dying on 17 March 1025. He was the son of Minamoto no Atsuru, and he belonged to the Minamoto clan, the imperial family line that supplied many of the warriors who shaped early samurai culture.

Tsuna is counted among the Shitennō (四天王, してんのう, "Four Heavenly Kings") of the Minamoto clan — a group of four celebrated retainers who served under Minamoto no Yorimitsu, better known as Raikō. Yorimitsu's band became the archetype of the loyal warrior fellowship in Japanese storytelling, and Tsuna stands among its most famous members.

His reputation rests less on documented campaigns than on legend. Tsuna is remembered as a demon-queller, a warrior who faced the oni (鬼, おに, ogres or demons) that populate Heian-era tales. The two most famous of these adversaries are Shuten-dōji and Ibaraki-dōji.

Life and Career

Tsuna was born in 953, in the seventh year of the Tenryaku era (天暦, てんりゃく). The Tenryaku era belonged to the reign of Emperor Murakami, a stretch of the mid-tenth century remembered for relative political stability at court. Tsuna grew up within the Minamoto clan's military household, the environment that produced Yorimitsu's famous retinue.

As a companion in arms of Minamoto no Yorimitsu, Tsuna took part in the exploits that made Yorimitsu's name a byword for demon-slaying. In the legendary cycles, Yorimitsu and his four retainers track down and destroy powerful oni that terrorise the capital and its surroundings. Tsuna's role in these stories is that of the bold and dependable lieutenant, the man sent forward when the danger is greatest.

He died on 17 March 1025, at the age of 72 by the count of his birth and death years. His son, Matsura Hisashi, carried the line forward. Tsuna is also the first person known to have taken the surname Watanabe, making him the ancestral figure of one of Japan's largest family names.

Why They Matter

Watanabe no Tsuna matters for two distinct reasons: one literary, one genealogical.

In literature and legend, he belongs to the small circle of Heian warriors whose deeds were retold for centuries in picture scrolls, Noh plays, kabuki, and printed tales. The Yorimitsu band — Yorimitsu with his four Shitennō — became the template for the loyal warrior band in Japanese narrative, a pattern that later samurai epics would reuse. Tsuna's specific fame comes from the belief that he vanquished oni regarded as the strongest of all, including Shuten-dōji and Ibaraki-dōji. That association gave him a lasting cultural weight beyond his historical deeds.

Genealogically, he is the origin point of the Watanabe surname. Watanabe is the fifth most common surname in Japan, borne by approximately 1.08 million people as of 2017. A single Heian warrior stands at the head of that enormous modern family tree.

The Name in Japanese

The full name is written 渡辺綱.

Kana reading: わたなべ つな

Romaji: Watanabe no Tsuna

The element no (の) between the surname and given name is a possessive particle, standard in older Japanese names of this type; it links the family name to the personal name, roughly "Tsuna of Watanabe."

Breaking the name down character by character:

渡 — read わた (wata) in this name. The character means "to cross," "to ferry across," or "a crossing." It is the same character used for ferrying people over water, and it appears in words connected to transit and passage.

辺 — read なべ (nabe) in this name. The character means "vicinity," "area," or "border." In modern Japanese it commonly appears in words meaning "surroundings" or "neighbourhood." Combined with 渡, the pair 渡辺 suggests a place by a crossing or ferry — a plausible origin for a surname taken from a location.

綱 — read つな (tsuna) in this name. The character means "rope," "cable," or "hawser," and by extension "main line" or "guiding principle." It is a strong, concrete image: the thick rope that binds or hauls. As a given name it carries connotations of strength and central importance.

So the name as a whole reads as a surname derived from a crossing place, paired with a given name meaning "rope" — a warrior's name built from the vocabulary of roads, rivers, and rigging.

Legacy

The most striking piece of Tsuna's legacy is a superstition attached to his name. Because he is believed to have vanquished oni considered the strongest — Shuten-dōji and Ibaraki-dōji among them — a tradition arose that oni stay away from people named Watanabe and from their houses. The belief is specific and practical: the demons are said to avoid the surname itself.

That tradition has had a real effect on custom. Some families bearing the surname Watanabe have not practised the Setsubun bean-throwing ritual for generations. Setsubun (節分, せつぶん) is the seasonal festival at which roasted soybeans are thrown to drive out demons; households that skip the rite do so because, by their reckoning, no demon would dare approach a Watanabe home in the first place.

Tsuna's son, Matsura Hisashi, continued the family line, and the Watanabe surname spread across Japan to become one of the country's most common. A tenth-century warrior who fought ogres in legend thus left two legacies at once: a place in the storytelling canon of the Heian samurai, and a name carried today by more than a million people.