The aim of this article is to examine the relationship between the Tokugawa Bakufu and Japan's feudal domains from the time of the Kansei Era reforms, which began in 1787, through the Kyowa Era, ending in 1804, by portraying a comprehensive picture of the scandal of 1801 involving feudal domain representatives stationed in Edo (rusui 留守居) and their concurrent punishment. The author begins by analyzing the Bakufu deliberations regarding how the rusui were to be punished, questioning of the suspects by Bakufu superintendent Inoue Moritoshi and Moritoshi's recommendations to top feudal domain officers concerning punishment, in order to understand the incident from beginning to end. Of the 59 top domain officers ordered to punish their rusui, 30 were feudal lords (daimyo 大名) who were in attendance before the Shogun in the Teikan Hall at Edo Castle, meaning that they had been allies (fudai 譜代) of Tokugawa Ieyasu. Next, the author turns to the developments within the feudal establishment after the incident and the problems facing the related research to date, which has been retarded due to historiographical reasons. In particular, the author points to the spontaneity with which the Teikan Hall daimyo chose to discipline their rusui, showing that there were those among them who were not marked for punishment, a fact which demonstrates the great impact which the scandal exerted on the feudal domains. Finally, the author examines reasons why the rusui under provincial scale (kunimochi 国持) daimyo and the Tokugawa Ieyasu family domains (gosanke 御三家) were not punished. He shows that punishing the kunimochi rusui would have dealt a serious blow to the Shogunates's prestige and authority, while punishing the gosanke rusui would have provided the pretense for the elders (tukekaro 付家老) of those domains, many of whom were descendants of fudai daimyo vassals, to elevate themselves to the level of "daimyo." The author concludes that while the Bakufu during the Kyowa Era exhibited a high degree of severity in dealing with the rusui scandal, it was also forced to give careful consideration to all of the affair's possible ramifications and nuances. Moreover, such thoroughness was a characteristic feature of Bakufu operations during that time and an important factor in its relationship with the country's feudal domains.

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