Battle of Kotesashi

What Happened

On 23 June 1333, the Battle of Kotesashi was fought in present-day Tokorozawa, Saitama, between the anti-shogunate imperial forces under Nitta Yoshisada and the pro-Shogunate forces of the Hōjō Regency under Sakurada Sadakuni. The engagement took place during the Genkō War, as part of the larger Kōzuke-Musashi Campaign that would ultimately bring down the Kamakura Shogunate.

The battle was the first of two consecutive days of fighting. The following day, 24 June 1333, the same armies clashed again at the Battle of Kumegawa. Both engagements ended in victory for the Imperial forces. Within less than a week, Nitta Yoshisada’s army marched roughly 50 kilometres south and defeated the Shōgun’s forces at the Siege of Kamakura, bringing the shogunate to an end.

Background

The Genkō War was a conflict between the Imperial court, seeking to restore direct imperial rule, and the Kamakura Shogunate, which had governed Japan through the Hōjō Regency since the late twelfth century. By 1333, the shogunate faced mounting opposition from regional warlords and disaffected nobles.

Nitta Yoshisada, a warrior from Kōzuke Province, raised the imperial banner in early 1333 and led his forces southward through the Kantō plain. The Kōzuke-Musashi Campaign was his push through the provinces of Kōzuke and Musashi toward the shogunate’s capital at Kamakura. Sakurada Sadakuni commanded the shogunate’s forces sent to block the advance. The two armies met at Kotesashi, a location in the Musashi plain, on the first day of the two-day confrontation.

The battle occurred in the second year of the Shōkyō era (正慶), a nengō, or era name, used by the shogunate-aligned court. The period as a whole is known as the Kenmu Restoration (1333–1336), which began with the fall of the Kamakura Shogunate and the brief return of direct imperial authority under Emperor Go-Daigo.

Why It Mattered

The Battle of Kotesashi was a decisive step in the collapse of the Kamakura Shogunate. The Imperial victory at Kotesashi and the follow-up Battle of Kumegawa cleared the path for Nitta Yoshisada’s rapid march to Kamakura. The shogunate’s forces, already stretched thin by years of war, could not stop the advancing army.

The two-day victory demonstrated that the Hōjō Regency could no longer defend its own heartland. Within a week, the shogunate’s capital fell, and the Hōjō clan was destroyed. The battle therefore marks a turning point in the Genkō War, shifting the conflict from a regional rebellion into a full-scale overthrow of the military government. The Kenmu Restoration that followed was short-lived, but the shogunate never returned to Kamakura.

The Name in Japanese

The battle is known in Japanese as 小手指原の戦い, read こてさしがはらのたたかい (Kotesashi-gahara no tatakai). The name combines the place name Kotesashi with 原 (gahara, “plain”) and 戦い (tatakai, “battle”). The full name means “Battle of the Kotesashi Plain.”

Breaking down the characters:

• 小 (こ, ko) — “small.” In this place name, it serves as a prefix attached to the following character.
• 手 (て, te) — “hand.” Together with 小, the two characters form the place name Kotesashi, though the literal meaning of the compound is not transparent from the characters alone.
• 指 (さし, sashi) — “finger” or “to point.” This character supplies the reading sashi in the place name. The combination 手指 (tesashi) can mean “finger,” but in this toponym it functions as part of the proper name.
• 原 (がはら, gahara) — “plain” or “field.” The character is read here as gahara, a voiced form of hara. It indicates that the battle took place on an open plain.
• の (no) — possessive particle, “of.” It links the place name to the noun that follows.
• 戦い (たたかい, tatakai) — “battle.” The noun form of the verb 戦う (tatakau, “to fight”).

The reading こてさし (Kotesashi) is the standard pronunciation of the place name. The character 原 is often written as ヶ原 (gahara) in alternative renderings, such as 小手指ヶ原の戦い, but the meaning remains the same. The location is in modern Tokorozawa, Saitama Prefecture, at coordinates 35.7970417, 139.4231194.

Key Figures

Nitta Yoshisada led the Imperial forces at Kotesashi. He was a warrior from Kōzuke Province who raised the banner of the Imperial court in 1333 and commanded the Kōzuke-Musashi Campaign. His victories at Kotesashi and Kumegawa led directly to the Siege of Kamakura, where he defeated the shogunate’s forces and ended the Kamakura Shogunate.

Sakurada Sadakuni commanded the shogunate’s army at Kotesashi. He served the Hōjō Regency, the ruling family that controlled the Kamakura Shogunate. His forces were defeated on both days of the engagement, and the loss marked the beginning of the end for the Hōjō regime.