Japan does not have states — it is divided into 47 prefectures, which serve as the country's primary administrative units. The word "state" is often used loosely by English speakers, but Japan's equivalent first-level divisions are called prefectures (todofuken in Japanese). These 47 prefectures range from sprawling Hokkaido in the north to subtropical Okinawa in the south, and together they govern roughly 1,700 smaller municipalities.
The 47 Prefectures Explained
While people often ask how many "states" Japan has, the accurate answer is 47 prefectures. They are not all the same type. The Japanese term todofuken reflects four distinct categories baked into the system:
- To (都): Tokyo alone holds this status as a metropolitan prefecture, reflecting its role as the national capital.
- Do (道): Hokkaido is the single "circuit," a historical designation for the vast northern island.
- Fu (府): Osaka and Kyoto are urban prefectures, a legacy of their importance during the imperial era.
- Ken (県): The remaining 43 are standard prefectures, the most common type.
Despite the different labels, all 47 function similarly today, each with an elected governor and a prefectural assembly responsible for education, policing, infrastructure, and welfare.
Eight Regions That Group the Prefectures
For convenience, the 47 prefectures are clustered into 8 unofficial regions. These regions have no government of their own but are widely used in weather forecasts, business, and everyday conversation:
- Hokkaido (1 prefecture): Hokkaido
- Tohoku (6): Aomori, Akita, Iwate, Miyagi, Yamagata, Fukushima
- Kanto (7): Ibaraki, Tochigi, Gunma, Saitama, Chiba, Tokyo, Kanagawa
- Chubu (9): Niigata, Toyama, Ishikawa, Fukui, Yamanashi, Nagano, Gifu, Shizuoka, Aichi
- Kansai / Kinki (7): Mie, Shiga, Kyoto, Osaka, Hyogo, Nara, Wakayama
- Chugoku (5): Tottori, Shimane, Okayama, Hiroshima, Yamaguchi
- Shikoku (4): Tokushima, Kagawa, Ehime, Kochi
- Kyushu-Okinawa (8): Fukuoka, Saga, Nagasaki, Kumamoto, Oita, Miyazaki, Kagoshima, Okinawa
The Kanto region, anchored by Tokyo, is the most densely populated, while Hokkaido and the Tohoku region cover huge but sparsely settled territory.
Where the System Came From
The prefecture system was introduced in 1871 during the Meiji Restoration through a reform known as the abolition of the han system. Before that, Japan was governed under hundreds of feudal domains (han) controlled by regional lords. The new central government consolidated these into a smaller, standardized set of prefectures reporting directly to Tokyo. Over the following decades the number was repeatedly reduced and reorganized, eventually settling at the 47 that exist today. Okinawa was the last major addition to return to the modern fold, as it was administered by the United States until reverting to Japanese control in 1972.
Biggest, Smallest, and Most Crowded
The 47 prefectures vary enormously in size and population:
- Largest by area: Hokkaido, at about 83,424 km², accounts for roughly 22% of Japan's entire land area.
- Smallest by area: Kagawa, on Shikoku island, covers just 1,877 km².
- Most populous: Tokyo, with over 14 million residents — more people than many entire countries.
- Least populous: Tottori, with fewer than 550,000 residents.
This contrast captures Japan's defining demographic feature: an intense concentration of people in a few urban prefectures, surrounded by mountainous, lightly populated regions. To explore the country's geography, landmarks, and culture in more depth, see our japan country guide.
Prefectures Versus US States
It is natural to compare Japan's prefectures to American states, but the two systems differ in important ways. US states retain substantial sovereign powers and their own constitutions, whereas Japanese prefectures operate within a single national framework and hold less independent authority. Prefectures are more comparable to administrative provinces, sitting between the national government and local cities, towns, and villages. They still wield real power over budgets, local policy, and public services, but the central government in Tokyo sets the broad legal and fiscal rules.
Frequently Asked Questions
Does Japan have states or prefectures?
Japan has prefectures, not states. There are 47 prefectures, which are the country's top-level administrative divisions. English speakers sometimes call them "states," but the correct term is prefecture.
What is the capital prefecture of Japan?
Tokyo is the capital and is itself a special metropolitan prefecture (to). It is home to the national government and over 14 million people, making it both the political heart and the most populous prefecture in Japan.
Which is the largest prefecture in Japan?
Hokkaido is by far the largest prefecture at roughly 83,424 km², covering about a fifth of Japan's total land area. The smallest is Kagawa at just 1,877 km².
How are Japan's prefectures organized?
The 47 prefectures are grouped informally into 8 regions and are further subdivided into around 1,700 municipalities such as cities, towns, and villages. Each prefecture has an elected governor and assembly.