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Ishigakiyama Ichiya-jo: Hideyoshi's 80-Day Stone Citadel
Built in just over 80 days during Hideyoshi's 1590 siege of Odawara, Ishigakiyama was the first full stone-walled castle in eastern Japan. Hideyoshi's headquarters where he met Date Masamune, hosted Sen no Rikyu's tea ceremony, and ended the warring states era.
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| Shrines & Temples
Ishigakiyama Castle, also called Ichiya-jo (One-Night Castle), was built in just over 80 days during Toyotomi Hideyoshi’s 1590 siege of Odawara Castle. It was the first full stone-walled castle in eastern Japan, marking the introduction of Kinai stone-construction techniques to the region. The castle served as Hideyoshi’s headquarters; here he met Date Masamune, hosted tea ceremonies by Sen no Rikyu, and decided the post-war disposition of eastern Japan. The keep ruins offer panoramic views of Odawara, Sagami Bay, the Izu Peninsula, and Hakone.
Last updated: May 2, 2026
Ruins of Ishigakiyama Ichiya-jo — first stone-walled castle in eastern Japan
Wikimedia Commons / CC BY-SA 3.0
View of Odawara Castle from Ishigakiyama — what Hideyoshi saw with his 220,000 troops
Wikimedia Commons / CC BY-SA 3.0
Portrait of Toyotomi Hideyoshi — used Ichiya-jo as his headquarters
Wikimedia Commons / Public Domain
Portrait of Date Masamune — pardoned by Hideyoshi after appearing at Ishigakiyama in white
Wikimedia Commons / Public Domain
Stone walls of Ishigakiyama — built by Ano-shu masons, pioneering early modern castle design
Wikimedia Commons / CC BY-SA 3.0
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Hijiri（ひじり）
Shrines & Temples
Toku editorial team — shrines and temples. Former designer who reads temple architecture and gardens through an aesthetic lens, quietly tracing the lineages of sects and doctrines.
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