Shima Sakon

Who They Were

Shima Sakon (島左近) was a samurai of the late Sengoku period, born 9 June 1540 in Heguri. His formal name was Shima Kiyooki (島清興), though he also went by Shima Tomoyuki and Shima Katsutake. The nickname "Sakon" derives from his court rank, meaning "Nearby on the Left," a title tied to the Left Division of the Imperial Guard.

Sakon served a succession of warlords over his sixty years: the Hatakeyama clan, then Tsutsui Junkei, then Toyotomi Hidenaga, and finally Ishida Mitsunari. He died on 21 October 1600 at Sekigahara, the site of the decisive battle that ended the Sengoku period.

Life and Career

Sakon's early career is tied to the Hatakeyama clan, a powerful family in the Kinai region that controlled much of what is now Nara and Osaka prefectures. He served them during the Muromachi period (1336–1573), a time when the shogunate's authority was collapsing and regional warlords fought for control. His birth in Heguri, a district in Yamato Province, placed him at the centre of this political turbulence.

After leaving the Hatakeyama, Sakon entered the service of Tsutsui Junkei, a daimyo who ruled Yamato Province. Junkei was a shrewd survivor who shifted allegiances as the balance of power changed, and Sakon's role under him was likely that of a senior retainer and military advisor. When Junkei died in 1584, Sakon moved on to serve Toyotomi Hidenaga, the younger half-brother of Toyotomi Hideyoshi, the man who unified Japan. Hidenaga was a capable administrator and general, and Sakon's service under him placed him in the inner circles of the Toyotomi regime.

Sakon's most famous association began when he joined Ishida Mitsunari, a senior administrator under Hideyoshi. Mitsunari was a bureaucrat rather than a warrior, and he relied heavily on Sakon's military expertise. Contemporary accounts describe Sakon as Mitsunari's most trusted battlefield commander, the man who compensated for his master's lack of combat experience.

Sakon saw action at the Battle of Yamazaki in 1582, where Toyotomi Hideyoshi defeated Akechi Mitsuhide, the general who had assassinated Oda Nobunaga. He also fought at the Battle of Kuisegawa, a skirmish that preceded the main engagement at Sekigahara. At Kuisegawa, Sakon commanded the vanguard of Mitsunari's forces, holding a defensive position against the eastern army led by Tokugawa Ieyasu.

The Battle of Sekigahara on 21 October 1600 was the climax of Sakon's life. Mitsunari's western army faced Ieyasu's eastern army in a foggy valley. Sakon fought in the thick of the fighting, reportedly leading charges and rallying troops. He was killed in the battle, though the exact circumstances of his death are not recorded. Sekigahara became his place of death, and the battle itself marked the beginning of Tokugawa rule that would last over 250 years.

Why They Matter

Sakon matters because he represents the ideal of the loyal retainer in Japanese history. His decision to serve Ishida Mitsunari, a man widely disliked by other warlords for his arrogance and administrative meddling, was unusual. Mitsunari was not a charismatic leader, and many of his own allies despised him. Sakon's willingness to stand by him, despite the odds, made him a symbol of personal loyalty over self-interest.

His military skill was also significant. At the Battle of Kuisegawa, Sakon's defensive tactics delayed the eastern army and gave Mitsunari's forces a chance to prepare for the main battle. Some accounts credit him with nearly turning the tide at Sekigahara itself, though the western army ultimately collapsed when several of its commanders betrayed Mitsunari mid-battle.

Sakon's death at Sekigahara also marks the end of an era. He was one of the last samurai of the Sengoku period, a generation of warriors who had fought through decades of civil war. After Sekigahara, the Tokugawa shogunate established a rigid peace, and the kind of freelance loyalty Sakon embodied became obsolete.

The Name in Japanese

The formal name is 島清興, read in kana as しま きよおき, and in romaji as Shima Kiyooki. The nickname 島左近, read しま さこん, is Shima Sakon.

Breaking down 島清興 character by character:

• 島 (しま, shima) — "island." This is the family name. The character combines a bird radical with a mountain, reflecting an old idea of islands as places where birds rest on mountain peaks.
• 清 (きよ, kiyo) — "pure" or "clear." This is the first character of the given name. It carries connotations of clarity, cleanliness, and moral uprightness — fitting for a man remembered for loyalty.
• 興 (おき, oki) — "to rise" or "to prosper." The second character of the given name. It depicts two hands lifting a tray, suggesting the act of raising something up. Together, 清興 (Kiyooki) can be read as "pure prosperity" or "clear rising."

The nickname 左近 (Sakon) breaks down as:

• 左 (さ, sa) — "left." This refers to the Left Division of the Imperial Guard.
• 近 (こん, kon) — "near" or "nearby." The full title 左近衛 (Sakone) meant "Left Guard," and the shortened form Sakon became a common name for warriors holding that rank.

Legacy

Sakon's legacy survived through the Edo period (1603–1868) as a model of the loyal retainer. Stories about his service to Mitsunari were retold in military chronicles and popular fiction, often emphasising his willingness to die for an unpopular master. He became a stock figure in kabuki and bunraku plays, where his character embodied the tension between personal honour and political reality.

In modern Japan, Sakon appears in video games, manga, and anime set in the Sengoku period. These portrayals often exaggerate his combat abilities, but they preserve the core image: a brilliant tactician who chose loyalty over advancement. His grave at Sekigahara is a minor pilgrimage site for history enthusiasts, and the battlefield itself remains a popular destination for those interested in the period.

Sakon's name also lives on in the phrase "Shima Sakon," which in some historical anecdotes was used to describe a retainer of exceptional quality. The fact that his nickname, rather than his formal name, became the standard way to refer to him reflects how deeply his identity was tied to his role as a warrior rather than a bureaucrat.