Tosa Province
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Tosa Province
Map of Japanese provinces (1868) with Tosa Province highlighted

Tosa Province (, Tosa no kuni) is a former province of Japan in the area that is today K?chi Prefecture on Shikoku.[1] Tosa was bordered by Iyo and Awa Provinces. It was sometimes called Dosh? () .


The ancient capital was near modern Nankoku. Tosa jinja was designated as the chief Shinto shrine (ichinomiya) for the province. [2]

Tosa was ruled by the Ch?sokabe clan during the Sengoku period, and Ch?sokabe Motochika briefly unified Shikoku under his rule, although he was reduced to Tosa again by Toyotomi Hideyoshi and dispossessed entirely after Sekigahara. The province was then granted to Yamauchi Kazutoyo. Tosa was a relatively poor province, and lacked a strong castle town even under the Ch?sokabe. After Sekigahara, the castle town of K?chi was established and remains the main city to this day. During the Edo period the province was controlled by the Tosa Domain.

Sakamoto Ry?ma of the Bakumatsu era was born in Tosa.

Samurai from Tosa were important in the Meiji Restoration of 1868.[1]

The Imperial Japanese Navy battleship Tosa, lead ship of its class, was named after the province.

Historical districts


  • Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 58053128

External links

Media related to Tosa Province at Wikimedia Commons

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