Lifespan: Tenshō 14 (1586) to 1/30 of Kanei 18 (1641)
Other Names: Jinjyūrō (common)
Title: Junior Fifth Rank (Lower), Assistant Vice-Minister of Civil Affairs
Bakufu: Edo – hatamoto
Lord: Tokugawa Hidetada → Tokugawa Iemitsu
Father: Kagatsume Masanao
Wife: [Formal] Daughter of Andō Naotsugu
Children: Naozumi, Nobuzumi, Sadazumi, daughter (formal wife of Ishikawa Fusanaga), daughter (wife of Mitsui Yoshitsugu)
Kagatsume Tadasumi served as a bushō in the Azuchi-Momoyama period and a hatamoto in the early Edo period. Tadasumi was the seventh head of the Kagatsume-Uesugi clan. He served as the lord of the Takasaka Castle in Musashi Province.
In 1586, Tadasumi was born as the son of Kagatsume Masanao. As a retainer of Tokugawa Hidetada, he received for his name the character “tada” from Hidetada. Owing to his contributions at the Battle of Sekigahara and the Siege of Ōsaka, he was invested with the title of Junior Fifth Rank (Lower) and Assistant Vice-Minister of Civil Affairs. Tadasumi initially received a fief of 5,500 koku and, along appointments to the positions of inspector, inspector-general, and magistrate of administrative and judicial affairs for Edo, he fief was increased to 9,500 koku. In 1612, while in Nagasaki, he witnessed the landing by a vessel from Macau (which was prohibited) and had it burned.
On 1/29 of Kanei 18 (1641), a major fire erupted in Okemachi in the Kyōbashi area of Edo. In his capacity as inspector-general, Tadasumi led the operations to extinguish the fire but, after his command post became enveloped in smoke, he died in the course of duty. At this time, there were inadequate facilities across the metropolis to contain the fire which grew into a major blaze. Further, Sōma Yoshitane, a daimyō and the lord of the Sōma domain appointed as the head of firefighting, was sriously injured after falling from his horse while confronting the blaze. In the wake of Tadasumi’s death in the line of duty, the Edo bakufu made an earnest effort to prepare the metropolis to manage the risks posed by fires. Two years later, in 1643, a new system was implemented.
The headship of the clan was inherited by his son, Kagatsume Naozumi, a hatamoto and daimyō in the early Edo period. In 1632, Tadasumi was appointed as the machibugyō, or magistrate in charge of administrative and judicial affairs, for Edo. In the preceding year, 1631, Hori Naoyuki was appointed to the same position. In this period, the position was held by two individuals simultaneously who were on duty on an alternating monthly basis. For the conduct of his duties, Naoyuki received a residence in Gofukubashi and was called kita-machibugyō, or the magistrate in the northern part of Edo. Meanwhile, Tadasumi received a residence in Tokiwabashi and was called the minami-machibugyō, or the magistrate in the southern part of Edo. Thereafter, successors appointed to these positions were referred to in a similar manner. These titles did not specify the jurisdiction of their authority, but, rather, the location of their residences in Gokufubashi and Tokiwabashi.
An intelligent character, Tadasumi had many personal connections and served as an intermediary between daimyō. Hosokawa Tadaoki, the head of the Higo-Kumamoto domain who had exchanges with Tadasumi, wrote in his diary that he felt deep sorrow at the sudden death of Tadasumi.
In 1630, Date Masamune, the lord of the Mutsu-Sendai domain, made arrangements to host and entertain Tokugawa Iemitsu, the third shōgun of the Edo bakufu. On the day before Iemitsu came to visit, Tadasumi accompanied Doi Toshikatsu and Sakai Tadayo (members of the shōgun‘s council of elders) to check-in with Masamune. When Tadasumi appeared, Masamune lightly slapped him on the head as an informal greeting, but Tadasumi became upset and firmly slapped Masamune’s head in return.