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Kuroda Yoshitaka (黒田 孝高?, December 22, 1546 – April 19, 1604), also known as Kuroda Kanbei (黒田 官兵衛 Kuroda Kanbee?), was a Japanese daimyo of the late Sengoku through early Edo periods. Renowned as a man of great ambition, he was a chief strategist and adviser to Toyotomi Hideyoshi. Kuroda became a Christian daimyo when he was 38, and received “Simeon Josui” as a baptismal name (“Rekishijin”). His quick wit, bravery, and loyalty were respected by his warriors.
Kuroda Yoshitaka was born in Himeji on December 22, 1546, the son of Kuroda Mototaka. The Kuroda clan are believed to have originated in Ōmi Province. Yoshitaka's grandfather Shigetaka brought the family to Himeji and took up residence at Gochaku Castle (御着城), east of Himeji Castle.
Shigetaka served as a senior retainer of Kodera Masamoto, the lord of Himeji, and was so highly praised that Shigetaka's son Mototaka was allowed to marry Masamoto's adopted daughter and to use the Kodera name. When his father, Mototaka died, Kuroda became the head of the Kuroda family at the age of 21.
Maturity and career
Yoshitaka succeeded to the family headship in 1567, the same year that he participated in the Siege of Inabayama Castle, when Oda Nobunaga defeated the Saitō clan of Mino province. A few years later, with Toyotomi Hideyoshi spearheading the Oda clan's advance into the Chugoku region, he pledged loyalty to the Oda. Yoshitaka, together with the sickly Takenaka Hanbei, served as Hideyoshi's strategists and assisted in the campaign against the Mōri clan.
Shortly before 1587, Yoshitaka was ordered by Hideyoshi to lead an attack into Kyushu. Along with him was the famous Christian daimyo Takayama Ukon. After seeing the thriving Christian population of Kyushu, under Ukon's influence, Yoshitaka was baptized with the name ドン・シメオン (Dom Simeão = Don Simeon). After a visit to the Jesuit-controlled port of Nagasaki, Hideyoshi became fearful of the powerful influence that Jesuits and the Christian daimyos wielded and in 1587 made his famous edict that expelled foreign missionaries and ordered all the Christian samurai under his rule to abandon their faith. While Ukon resisted the edict and lost his faith, Yoshitaka gave up his new religion and adopted a monk's habit, calling himself Josui (如水). Like Naitō Joan (who took his name from Portuguese João), it is believed that Yoshitaka chosen his new name from "Josué", the Portuguese version of "Joshua". His most prominent act during his short time as a Christian was his arrangement to save a Jesuit mission from Bungo when the Christian daimyo of that province, Ōtomo Sōrin, was under attack from the Shimazu clan.
Kuroda was a frugal person, and he sold used military equipment and personal belongings to his vassals. He saved enough money to pay mercenaries in the Sekigahara War due to his thrifty mind. His last words were “Do not try to gain other people’s favor and do not wish for wealth."  He was also involved in the project to build principal castles: Himeji castle, Nagoya castle, Osaka castle, and Hiroshima castle under the reign of the Toyotomis.
According to a television program about Japanese historical figures, Kuroda was simultaneously feared and his intelligence was under-estimated by his lord, Toyotomi. This is because Kuroda helped Toyotomi to reign over the whole country as his shadow strategist, and Toyotomi thought that Kuroda would defeat him eventually. In addition, Kuroda deepened a friendship with Sen no Rikyu who was known as the founder of the Japanese tea ceremony “wabi-cha” when Kuroda joined Rikyu’s tea ceremony with Toyotomi.
In 1577, Arioka castle’s lord, Murashige Araki, concluded an alliance with the Mouri to revolt against the Oda clan. An ally, Masamoto Kodera, also framed a plot to cooperate with Araki. Then, Kuroda went to Arioka castle to prevail on Araki not to become a defector of Oda in 1578  Nevertheless, Araki jailed him because Kuroda failed to prevail on Araki. After Kuroda was imprisoned, he had a leg disorder and lost his eyesight in one eye because of the dungeon’s lack of space for sleeping and sitting.
Yoshitaka made an attempt to conquer the region of Kyūshū during the Battle of Sekigahara, but this ended up in failure even though he was able to momentarily gain the control of over seven provinces in Kyūshū due to Tokugawa Ieyasu's victory in the Battle of Sekigahara and his enter in Osaka. After moving to Chikuzen Province (筑前国 Chikuzen no kuni) which today is part of Fukuoka Prefecture, the Kuroda built a new castle near Hakata-ku (博多区), and named it Fukuoka Castle (福岡城, Fukuoka-jō) also known as Maizuru Castle (舞鶴城 Maizuru-jō) or Seki Castle (石城 Seki-jō) which was completed in the early Edo period for tozama daimyo Kuroda Nagamasa. After his son Nagamasa succeeded him, Yoshitaka died on April 19, 1604.
- People of the Sengoku period in popular culture for more information on Kuroda Yoshitaka .
- Yoshikawa Eiji, historical fiction
- Gunshi Kanbei, the 2014 NHK taiga drama
- In western literature, Kuroda Yoshitaka is also known as: Simon Kondera, Simone Condera, Simon Condera, Simeon Condera, for "Simon 小寺（こでら）--"小寺" might have been pronounced like /kõdeɾa/; Kodera Cambyoye, Kodera Kambyoye, Quadera Quanbioi, Condera-quansioye, Condera Quamvioyi, Condera Canbioye, for "小寺 官兵衛（くゎんびゃうゑ）"--"官兵衛" might have been pronounced like /kwãɸjo:je/ or /kambjo:je/; Kuroda Kambroye, Kuroda Cuwanbioye, Kuroda Kuwanbiyauwe, for "黒田 官兵衛--"Condera/Kondera and Kuroda are distinct family names.; Condera Combioendono, Condera Combiendono, for "小寺 官兵衛 殿"; Cambioiendono, Quambioi-dono, Quambioindono, for "官兵衛 殿（どの）"; Conder Yoshitaka for "小寺 孝高（よしたか）"; Kuroda Josui for "黒田（くろだ） 如水（じょすい）"; Iosui for "如水"--"I" was the capital letter for both "i" and "j"; "Kuroda Kageyu" for "黒田 勘解由（かげゆ）"--勘解由 was an abbreviation form of 勘解由次官（かげゆのすけ）; Simeon Kuroda for "Simeon 黒田". “Kambroye” is considered to be what “Kambyoye” was mis-read as; and "s" for "quansioye” is considered to be what “f” was mis-read as--before 18th century, the letter “s” was sometimes spelled as “ſ ”(long s), which is similar to "f"."
- “Samurai File 17; Kuroda Kanbei.” Editorial. Japan World 15 Jan. 2014: 1. Web. 8 Dec. 2015.
- Miura, Akihiko. Kuroda Jhosui. Fukuoka: Nishi Nihon Jinbutsu shi, 1996. Print.
- “Kanbei Kuroda’s quotes.” Editional. Meigen Kakugen no Housekibako n.d. Web. 7 Dec. 2015.
- “23 Kuroda Kanbei, the man who was most feared by Hideyoshi.” The Number 2. Preside. Masahiko Nishimura. BS-TBS. Tokyo, 5 Sept. 2011. Television.
- “The Reason Why Kanbei was Imprisoned.” Editorial. Itami n.d. PDF.
- Andō Hideo 安藤英男. Shiden Kuroda Josui 史伝黒田如水. Tokyo: Nichibō Shuppansha, 1975.
- Harada Tanemasa 原田種眞. Kuroda Josui 黒田如水. Tokyo: Benseisha 勉誠社, 1996.
- Kaneko Kentarō 金子堅太郎. Kuroda Josui den 黒田如水伝. Tokyo: Bunken Shuppan 文献出版, 1976.
- Motoyama Kazuki 本山一城. Jitsuroku Takenaka Hanbei to Kuroda Kanbei 実錄竹中半兵衛と黒田官兵衛. Tokyo: Murata Shoten 村田書店, 1988.
- Yoshikawa, Eiji. (1989) Yoshikawa Eiji Rekishi Jidai Bunko (Eiji Yoshikawa's Historical Fiction), Vol. 44: Kuroda Yoshitaka (黒田如水). Tokyo: Kodansha. ISBN 978-4-06-196577-5