INTERACTIVE BATTLE
Battle of Ishigakibaru
19 October 1600 · Ishigakibaru, Bungo Province
Otomo Yoshimune, seeking to recover his old domain, met the forces of Kuroda Yoshitaka and Matsui Yasuyuki on the Beppu alluvial fan; the Kuroda and Matsui side won.
Background
Two days before Sekigahara the Beppu fan became a battlefield. Otomo Yoshimune had taken position at Tateishi and begun attacking Kitsuki Castle. Kuroda Yoshitaka of Nakatsu in Buzen met him together with Matsui Yasuyuki, a Hosokawa retainer.
Outcome
Heavy fighting ran from midday into the evening. The Otomo had the better of it at first, but the more numerous Kuroda and Matsui forces cut down their leading commanders and settled the day. Yoshihiro Muneyuki of the Otomo took his own life on the field. The fighting ended on 21 October and Yoshimune surrendered.
Course of the battle
1 Midday to evening, 19 October 1600
Heavy fighting on the Ishigakibaru fan
Fighting raged on the fan from midday into the evening. The Otomo had the better of it at first, but the more numerous Kuroda and Matsui forces cut down their leading commanders and settled the day; Yoshihiro Muneyuki died by his own hand here.
Sources12·Certainty: High
2 21 October 1600
Otomo Yoshimune surrenders
The fighting ended and Yoshimune surrendered; four centuries of Otomo history closed here at Beppu.
Sources12·Certainty: High
Historical significance
Four centuries of Otomo history ended here, and the battle shows that the war tied to Sekigahara was being fought in Kyushu as well.
Key figures
徳川方
2
Commander of the Kuroda and Matsui force
He marched from Nakatsu in Buzen to meet Otomo Yoshimune and decided the day with superior numbers.
Sources1·Certainty: High
Hosokawa retainer
As a Hosokawa retainer he supported the Kuroda side and cut down the Otomo's leading commanders.
Sources1·Certainty: Medium
石田方
2
Commander of the Otomo force
He crossed to Bungo to recover his old domain, took position at Tateishi and attacked Kitsuki Castle, then was beaten at Ishigakibaru and surrendered.
Sources1·Certainty: High
Otomo commander
One of the foremost Otomo commanders, he fought here and took his own life.
Sources1·Certainty: High
Other events of 1600
Notes on the data
The source dates the battle to the 13th day of the 9th month of Keicho 5. The Gregorian date is derived from the verified equivalence of the 15th with 21 October 1600, within the same lunar month.
Sources consulted
- 別府市「大河ドラマ『軍師官兵衛』ゆかりの石垣原合戦」
- 国土地理院 住所検索
The numbers in the text refer to the list above. Certainty indicates how far a statement is supported by the cited sources; it does not refer to the precision of the coordinates or the dating.
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