The Kiheitai: How a Mixed-Class Militia Beat the Tokugawa Army

The Kiheitai, founded at Shimonoseki in June 1863, is the direct ancestor of the conscript army of Meiji Japan. The founder was Takasugi Shinsaku. The unit began with about eighty men, recruited without regard to class — samurai, peasants, and townsmen serving together. The name itself — kiheitai, the irregular unit — was meant to mark the distinction from the regular domain forces. Under the rigid class structure of the period, the form was anomalous.

Why Takasugi Created It

In May 1863 the Chōshū domain had shelled American, British, French, and Dutch shipping at Shimonoseki, and the foreign fleets had returned in force and devastated the Chōshū batteries. The episode demonstrated that the regular samurai army could not stand against the Western powers. Takasugi, freshly returned from his Shanghai trip the previous year — where he had seen the half-colonized state of Qing China at first hand — concluded that a class-blind, practically-trained force was necessary. The Shōka Sonjuku training and the Shanghai experience crystallized in the concrete organizational form of the Kiheitai. The daimyō Mōri Takachika approved the experiment, and the unit operated as a quasi-official Chōshū auxiliary.

The Four-Border War as Demonstration

The Kiheitai's combat capacity was demonstrated in the Four-Border War — the Second Chōshū Expedition — between June and September 1866. The bakufu sent about 150,000 regular troops in from four directions; the Chōshū side, including the Kiheitai and the other auxiliary units, fielded only about 3,500. The numerical disparity exceeded forty to one. Even so, the bakufu attack was repulsed on all four fronts — the Akiguchi, Sekishū, Ōshima, and Kokura lines — and by September a de facto truce was in effect. It was the first battlefield demonstration of the capacity gap between a samurai regular force and a class-mixed, modernly organized one.

Direct Continuity Into Meiji Conscription

The Meiji conscription edict of 1873 is formally modeled on the Western examples of the period. But its operational lineage runs through the Kiheitai. Yamagata Aritomo — a Shōka Sonjuku student who had served in the Kiheitai — became the founder of the modern army, and scaled the Kiheitai's organizational principles to the national level. The idea that military force, monopolized by the samurai class in the Edo period, should be opened to the entire population begins with Takasugi's 1863 decision and runs through the Meiji state-building program as one of its constitutive premises.

"Those of will, without regard to class."