Captain F. Brinkley, Japan: Its History, Arts, and Literature… (1902)
“ When Tadayoshi, the fourth son of Tokugawa Iyeyasu, died in 1601, not only did three of his most trusted vassals commit suicide, but a fourth, who had been banished to Oshiu in consequence of some offence, hastened to Yedo and killed himself within the precincts of the Temple Zōjō-ji. In the same year Hideyasu, second son of Iyeyasu, died. Two of his attendants immediately committed suicide, and his chief factor was about to follow their example when peremptory vetoes arrived from Hidetada, the reigning Viceregent, and from Iyeyasu himself. ”
