Kuroda Kanbei

Birth of a Strategist

Born in Harima Province, Himeji in Tenbun 15 (1546), Kuroda Kanbei (Takataka/Josui) was one of the Sengoku era's foremost strategists, serving as military advisor to Toyotomi Hideyoshi in achieving national unification. Feared by Hideyoshi as "a man capable of taking the realm"—a singular figure whose exceptional intellect and cunning were instrumental in Hideyoshi's hegemonic ambitions, yet simultaneously aroused the warlord's wariness throughout his life.

As Hideyoshi's Military Advisor

Kuroda's strategic brilliance shone most brightly during the "Great Return from China" of Tenshō 10 (1582). Upon hearing the news of the Honnō-ji Incident, Hideyoshi received immediate counsel from Kanbei: "Your fortune has opened, my lord." Kanbei then proposed a swift peace settlement with the Mōri clan and a rapid march to Kyoto. This single remark inspired such fear in Hideyoshi that he thought, "This man is capable of taking the realm." The dazzling success of the Great Return from China could never have been achieved without Kanbei's stratagem.

The Strategy of the China Campaign Withdrawal

Inseparable from Kanbei's life is the episode of his confinement in Arioka Castle during Araki Murashige's rebellion. In Tenshō 6 (1578), seeking to persuade Araki Murashige to reconsider his treason, Kanbei ventured into Arioka Castle alone, only to be captured and imprisoned in deplorable conditions for approximately one year. During this confinement, Kanbei suffered an injury to his leg, leaving him dependent on a cane for the rest of his life; yet his resolve never wavered. This unbreakable spirit epitomizes the steely conviction that defined Kanbei's entire existence.

Contribution to National Unification

The most celebrated sword in Kanbei's collection is "Heshikiri Hasebe." Originally the cherished blade of Oda Nobunaga, this tachi was bestowed upon Kanbei as a reward for his accomplishments. Forged by Hasebe Kunishige, it displays the sublime beauty of a powerful hitatsura hamon—characteristic of Sōshū-den—that extends across the entire blade. The fact that Nobunaga, renowned for the tale of crushing a tea attendant along with his shelf using this sword, entrusted it to Kanbei speaks volumes to the estimation in which Nobunaga held his talents. Heshikiri Hasebe has been designated a National Treasure and is currently housed in the Fukuoka City Museum.

Discernment in Swords

Another National Treasure, "Nikkō Ichimonji," is also a celebrated heirloom of the Kuroda family. A work of the Fukuoka Ichimonji school, it is a masterpiece of Bizen swordsmithing, displaying a splendid large-tegane ranbu hamon that unfolds across the entire blade. The name "Nikko" derives from its dedication at the Nikko Futarasan Shrine. This tachi was presented to Kuroda Josui by Hojo Ujinao as a token of gratitude following the peace settlement of the Odawara Campaign in Tenshō 18 (1590), and has been transmitted through the Kuroda house as a supreme treasure. Heshikiri Hasebe and Nikkō Ichimonji—representing the pinnacle of Sōshū-den and Bizen-den respectively—the Kuroda family's sword collection eloquently testifies to Kanbei's intellectual acuity and refined aesthetic sensibility.

Later Life as Josui

In his twilight years, Kanbei entered the Buddhist priesthood, taking the name "Josui" (如水). Josui means "like water," derived from the Daodejing maxim: "The highest good is like water." Water freely assumes any form, flows toward low places, yet nourishes all things—a name that encapsulates Kanbei's flexible stratagems and profound philosophy of life.

Symbol of Wisdom and Schemes

During the Battle of Sekigahara in Keichō 5 (1600), Kanbei undertook independent military actions in Kyushu, swiftly conquering northern Kyushu within a matter of days. This maneuver has been interpreted as evidence that "Josui himself harbored ambitions for the realm." Yet because the battle's outcome was decided with surprising speed, Kanbei's ambitions came to naught.

Kanbei died in Kyoto in Keichō 9 (1604), at the age of 59. His son, Kuroda Nagamasa, obtained 523,000 koku of Chikuzen Fukuoka as a reward for his valor at Sekigahara, establishing the foundation of Fukuoka domain. The renowned swords that Kanbei had collected were carefully preserved within the Kuroda house, and the Kuroda family's sword collection, including two National Treasures, remains among Japan's finest to this day.