How many han were there in Edo Japan?

Approximately 250-270 han at the height of the Edo period, though the number fluctuated as domains were created, abolished, or reorganised. They ranged enormously in size — from the great Maeda domain of Kaga (over 1 million koku) to tiny domains of barely 10,000 koku. Each was nominally independent in its internal governance while remaining within the shogunate's overall political framework.

What happened to the han system?

The han system was abolished in 1871 in the haihan chiken (廃藩置県) reform — 'abolition of han and establishment of prefectures.' The Meiji government replaced the 250+ autonomous han with a system of centrally administered prefectures. Former daimyo were pensioned off; their samurai retainers lost their stipends. The event marked the final end of the feudal structure.

Han: The Feudal Domains of Edo Japan

The han (藩) was the basic unit of Edo Japan’s political geography — a daimyo’s domain, semi-autonomous in internal affairs but subordinate to the Tokugawa shogunate’s overall authority. For 268 years, Japan was governed through this dual structure of central shogunate and regional domains.

The Bakuhan Structure

Historians call the Edo political system the bakuhan (幕藩) system — combining baku (from bakufu, the shogunate) and han. The shogunate controlled the overall framework: foreign policy, inter-domain relations, national roads, currency, and the supervision of daimyo through regulations and the sankin-kotai (alternate attendance) requirement. Within their domains, daimyo governed largely as they chose. [history]

Each han had:

Its own samurai retainer band (hanshi) — the lord’s military and administrative staff
Its own laws (hanpō) — criminal law, civil regulations, and economic rules
Its own taxation — collected from farmers within the domain
Its own finances — often managed with varying degrees of competence or crisis [history]

The Range of Domains

The approximately 250-270 han varied enormously in size and character:

Large domains (100,000+ koku): The Maeda of Kaga, the Shimazu of Satsuma, the Date of Sendai — powerful outside lords (tozama daimyo) whose large domains gave them independent economic bases. The Tokugawa kept these lords strategically distant from Edo and burdened them with expensive alternate attendance requirements. [history]

Middle domains (10,000-100,000 koku): The majority of the system. These lords had genuine administration, retainer bands, and local power, but were too small to challenge the shogunate.

Direct Tokugawa lands (tenryo): The shogunate held approximately 4 million koku of territory directly — not as a single han, but as scattered domains managed by appointed officials. This direct landholding, plus the ability to control key strategic locations, was the material basis of Tokugawa power.

Inside a Han

A han functioned like a miniature state. The daimyo and his senior retainers administered justice, taxed the domain’s farmers, maintained roads and irrigation, and ran schools (many domains established hankō, domain schools for samurai education). [history]

The domain’s finances were chronically strained in the Edo period. Fixed incomes from rice assessments met rising administrative costs poorly. Many han ran structural deficits by the 18th century, borrowing from merchant houses and repeatedly attempting — often unsuccessfully — financial reform.

Abolition

The han system ended in 1871 with the haihan chiken (廃藩置県) decree — a stunning act of centralisation by the new Meiji government. Former daimyo were replaced by appointed prefectural governors; most former daimyo were given peerage titles and financial settlements. The samurai retainers lost their stipends over the following years.

What had governed Japan for 268 years disappeared within a generation.