Japan is divided into 47 administrative regions called prefectures (都道府県, todōfuken). This seemingly arbitrary number is the product of nearly two centuries of political evolution following the Meiji Restoration of 1868.
The Historical Background
Before the Meiji era, Japan was divided into feudal domains called han, administered by lords (daimyō) under the Tokugawa shogunate. When Emperor Meiji was restored to power, the new government needed to create a centralized administrative system to modernize the country and consolidate power.
The Meiji Reforms
In 1871, the Meiji government abolished the han system in a sweeping reform called the "Abolition of the Han and Establishment of Prefectures" (廃藩置県, haihan chiken). Initially, more than 300 domains were consolidated into 72 prefectures. This was quickly reorganized, and by 1889, Japan had settled on the current system of 47 prefectures.
The Four Types of Todōfuken
Japan's 47 prefectures are divided into four distinct constitutional designations: - 1 Metropolis (都, to): Tokyo, which has a unique metropolitan administrative structure integrating 23 Special Wards - 1 Circuit/Territory (道, dō): Hokkaido, Japan's northernmost main island and largest single administrative division - 2 Urban Prefectures (府, fu): Osaka and Kyoto, historically significant commercial and imperial centers - 43 Prefectures (県, ken): The remaining regional administrative divisions across Honshu, Shikoku, and Kyushu
Why 47?
The number 47 reflects a deliberate balance between the historical feudal boundaries and practical modern governance. Some historical powerhouses like Kyoto and Osaka retained special status (fu), while rural domains were strategically consolidated to ensure adequate tax bases and manageable municipal jurisdictions.
Modern Regional Groupings
Although prefectures are the primary administrative unit, Japan is also grouped into eight traditional geographic regions: Hokkaido, Tohoku, Kanto, Chubu, Kansai, Chugoku, Shikoku, and Kyushu-Okinawa. Each possesses distinct climatic patterns, culinary traditions, and linguistic dialects.
Modern Administration and Devolution
Today, each prefecture is governed by a directly elected governor and prefectural assembly. They have significant autonomy in education, public works, police services, and regional infrastructure planning, while the national government in Tokyo manages monetary policy, defense, and foreign affairs.