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INTERACTIVE BATTLE

Kasai-Osaki Uprising

1590年11月〜1591年7月 · Former Kasai and Osaki territories

Former retainers in the confiscated Kasai and Osaki territories rose against the newly installed Kimura house before being defeated at Sanuma Castle.

Background

After Odawara, the Toyotomi settlement removed the old lords and installed the Kimura. Rapid changes of lordship and land surveys produced regional conflict.

Outcome

The uprising ended at Sanuma Castle in July 1591. Date Masamune helped suppress it but was also suspected of involvement and was transferred to Iwadeyama.

Kasai-Osaki Uprising — Former Kasai and Osaki territories

Course of the battle

1　November 1590

Former retainers rise

Former Kasai and Osaki retainers opposed Kimura rule and occupied Sanuma Castle and other positions.

豊臣秀吉

Toyotomi Hideyoshi — 奥羽仕置を主導

伊達政宗

Date Masamune — 討伐を担当・関与を疑われる

蒲生氏郷

Gamō Ujisato — 奥羽支配に関与

石田三成

Ishida Mitsunari — 奥羽仕置に関与

Sources123·Certainty: Medium

2　Early 1591

Masamune is suspected of involvement

Date Masamune, involved in suppression, was suspected of supporting the uprising and went to Kyoto to defend himself. His role remains disputed.

豊臣秀吉

Toyotomi Hideyoshi — 奥羽仕置を主導

伊達政宗

Date Masamune — 討伐を担当・関与を疑われる

蒲生氏郷

Gamō Ujisato — 奥羽支配に関与

石田三成

Ishida Mitsunari — 奥羽仕置に関与

Sources123·Certainty: Medium

3　July 1591

The uprising ends at Sanuma Castle

The rebels at Sanuma Castle were defeated, ending the uprising in the former Kasai and Osaki lands.

豊臣秀吉

Toyotomi Hideyoshi — 奥羽仕置を主導

伊達政宗

Date Masamune — 討伐を担当・関与を疑われる

蒲生氏郷

Gamō Ujisato — 奥羽支配に関与

石田三成

Ishida Mitsunari — 奥羽仕置に関与

Sources123·Certainty: Medium

Historical significance

The uprising shows that Toyotomi unification involved changes of lordship and surveys as well as conquest, and that these measures met regional resistance.

Key figures

豊臣氏

3

豊臣秀吉

Toyotomi Hideyoshi — 奥羽仕置を主導

豊臣方

Sources123·Certainty: Medium

蒲生氏郷

Gamō Ujisato — 奥羽支配に関与

豊臣方

Sources123·Certainty: Medium

石田三成

Ishida Mitsunari — 奥羽仕置に関与

豊臣方

Sources123·Certainty: Medium

伊達氏

1

伊達政宗

Date Masamune — 討伐を担当・関与を疑われる

豊臣方

Sources123·Certainty: Medium

Other events of 1590

3/29　伊豆国山中城の戦い4/3　相模国小田原城包囲開始6/14　武蔵国鉢形城開城6/23　武蔵国八王子城落城7/5　相模国北条氏直が降伏8/1　武蔵国徳川家康が江戸へ入る陸奥国奥州仕置相模国小田原城下の総構築造

Notes on the data

Troop totals, losses, and individual exploits are limited to what the research note supports.

Sources consulted

  1. 仙台市博物館「伊達政宗に関する資料（2）」
  2. 登米市「首壇」
  3. 文化遺産オンライン「伊達政宗書状」

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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