THE日本史

Azuchi–Momoyama period / ESSENTIAL EVENT

The Honnoji Incident

Akechi Mitsuhide turned his army toward Kyoto and attacked Oda Nobunaga, abruptly ending Nobunaga’s drive toward national unification.
Historical place
山城国・京都
People connected
4
本能寺を襲う武者たちを描いた本能寺焼討之図
本能寺焼討之図Image source ↗
01 / CONTEXT

Why it happened

By 1582, Nobunaga’s armies dominated central Japan and campaigned on several fronts. He stayed at Honnoji in Kyoto with a small entourage while Mitsuhide prepared to march west in support of Hashiba Hideyoshi.

02 / EVENT

What happened

Before dawn on 2 June, Mitsuhide’s troops surrounded Honnoji. Nobunaga fought briefly and died inside the temple; his heir Nobutada was attacked at Nijo and also died. The precise motive remains debated because no conclusive contemporary statement survives.

03 / AFTERMATH

What came next

Hideyoshi rapidly concluded peace in western Japan, returned to the Kyoto area and defeated Mitsuhide at Yamazaki. His speed gave him a decisive advantage in the struggle to inherit Nobunaga’s political position.

04 / SIGNIFICANCE

Why it still matters

The incident changed the successor to the unification project without ending that project. It is best understood through the simultaneous movements of Nobunaga, Mitsuhide, Hideyoshi, Ieyasu and the imperial court.

PLACE

Read the landscape

The modern Honnoji is not on its 1582 site. A marker near the former location and Kyoto’s related Akechi and Toyotomi sites make a useful historical walk.

Open the historical location on a map ↗

PEOPLE

People in this story

織田 信長おだ のぶなが明智 光秀あけち みつひで豊臣 秀吉とよとみ ひでよし正親町天皇おおぎまちてんのう
Person profiles are currently available in Japanese.

SOURCES

Evidence and further reading

一次史料信長公記信長旧臣・太田牛一が編纂。事件経過を考える基礎史料。Open source ↗同時代の日記家忠日記事件直後に家康側へ届いた情報と、誤報が訂正される過程を記録。Open source ↗考古学旧本能寺跡京都市の調査で確定した当時の寺域と現在の石標位置。Open source ↗研究資料土橋重治宛光秀書状事件後の光秀の政権構想を考えるための原本史料。Open source ↗

Source titles and descriptions are shown in Japanese so you can identify the original institutional page.