Iyo Province (伊予国 Iyo-no-kuni) was an old province of Japan in the area that is today Ehime Prefecture on Shikoku. Iyo bordered on Awa, Sanuki, and Tosa Provinces. It was sometimes called Yoshū (予州) .
The ancient provincial capital was near modern Imabari. During the Sengoku period it was split into several fiefs, the largest one usually being run from Matsuyama Castle in Matsuyama. It was briefly unified by the Chōsokabe clan of neighboring Tosa, but Toyotomi Hideyoshi invaded Shikoku in 1584 and reallocated the fiefs. During the Edo period the province was controlled by Uwajima Domain.
The people spoke Iyo dialect.
- Ehime Prefecture
- Iyo District (伊予郡) – absorbed remaining parts of Shimoukena District on April 18, 1896
- Kazahaya District (風早郡) – merged into Onsen District (along with Kume and Wake Districts, with parts of Shimoukena District) on April 18, 1896
- Kita District (喜多郡)
- Kume District (久米郡) – merged into Onsen District (along with Kazahaya and Wake Districts, with parts of Shimoukena District) on April 18, 1896
- Kuwamura District (桑村郡) – merged with Shūfu District to become Shūsō District (周桑郡) on April 18, 1896
- Nii District (新居郡) – dissolved
- Noma District (野間郡) – merged into Ōchi District on April 18, 1896
- Ōchi District (越智郡) – absorbed Noma District on April 18, 1896
- Onsen District (温泉郡) – absorbed Kazahaya, Kume and Wake Districts, along with parts of Shimoukena District, on April 18; 1896; now dissolved
- Shūfu District (周布郡) – merged with Kuwamura District to become Shūsō District on April 18, 1896
- Uma District (宇摩郡) – dissolved
- Ukena District (浮穴郡)
- Uwa District (宇和郡)
- Wake District (和気郡) – merged into Onsen District (along with Kazahaya and Kume Districts, with parts of Shimoukena District) on April 18, 1896
- Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 58053128
Media related to Iyo Province at Wikimedia Commons
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