Arima Haruzumi Japanese feudal lord in the Sengoku era. Initially known as Arima Sadazumi, he held the title of Shuri-dayu and a position in the shobanshu, the private guard of the Shogun. His tenure as lord had the Arima at the height of their power, controlling trade in the strategically important Shimabara Peninsula

Shimabara Peninsula

Shimabara Peninsula is east of Nagasaki City, Nagasaki Prefecture, Kyūshū, Japan. On its north-eastern tip stands Shimabara City. It was also the site of the Shimabara Rebellion, a 1637-1638 peasant revolt led by Christians. This further reinforced distrust of Christians and foreigners by Shogun...

, near modern-day Nagasaki. Ashikaga Yoshiharu

Ashikaga Yoshiharu

was the 12th shogun of the Ashikaga shogunate who held the reins of supreme power from 1521 through 1546 during the late Muromachi period of Japan...

, the 12th Ashikaga shogun, recognizing his strategic importance and strength, allowed him to take a character from his name and call himself "Haruzumi."

In 1546 he attacked Ryuzoji Iekane's Mizu-ga-e Castle, and while he captured it, Iekane led a counterattack after a mere two months, recapturing it. After this, Haruzumi gave his second son in adoption to the Omura clan, and it was this son who would become Ōmura Sumitada

Omura Sumitada

Ōmura Sumitada Japanese daimyo lord of the Sengoku period. He achieved fame throughout the country for being the first of the daimyo to convert to Christianity following the arrival of the Jesuit missionaries in the mid-16th century. Following his baptism, he became known as "Dom Bartolomeu"...

. In the course of his tenure as lord, Haruzumi clashed with many local daimyo

Daimyo

is a generic term referring to the powerful territorial lords in pre-modern Japan who ruled most of the country from their vast, hereditary land holdings...

 such as the Goto

Goto

goto is a statement found in many computer programming languages. It is a combination of the English words go and to. It performs a one-way transfer of control to another line of code; in contrast a function call normally returns control...

, Hirai

Hirai

-People:*Family name is Hirai.*Hirai Hisashi*Hirai Kanako*Hirai Kazuo*Hirai Kazumasa, author*Hirai Kazumasa, weightlifter*Hirai Ken*Hirai Kōzaburō, Japanese composer*Hirai Minoru*Hirai Naohito*Hirai Nobukazu*Hirai Seijirō, railroad engineer*Hirai Shinji...

, Matsuura

Matsuura

Matsuura is a Japanese name, and can refer to:Companies:*Matsuura Machinery, an international heavy machinery manufacturing company in Fukui, Fukui Prefecture, Japan*Matsuura Railway, a railway company in Nagasaki and Saga Prefecture in Japan...

, Omura, Saigo

Saigō

Saigō can refer to:Places in Japan:* Saigō, Shimane* Saigō, MiyazakiPeople :* Saigō-no-Tsubone* Saigō Takamori* Saigō Tanomo* Teruhiko Saigō* Saigō Tsugumichi...

, and Taku

Taku

Taku can refer to:In places* Taku, Saga, a city located in Saga prefecture on the island of Kyūshū, Japan* Taku, India, a town in India* Taku Glacier, in Alaska near Juneau* Taku River, in Alaska and British Columbia...

. He soon on expanded the Arima

Arima (disambiguation)

Arima is a town in Trinidad and Tobago.Arima may also refer to:* Arima, couch of Typhoeus, a place in Greek myth where Echidna still lives* Arima, a genus of leaf beetles...

 to control five districts of Hizen Province

Hizen Province

was an old province of Japan in the area of Saga and Nagasaki prefectures. It was sometimes called , with Higo Province. Hizen bordered on the provinces of Chikuzen and Chikugo. The province was included in Saikaidō...

. As a result of his military conquests and political maneuvering, Haruzumi was able to control all of Hizen Province by way of political maneuvering.

In his later years, Portuguese vessels began to appear in the waters controlled by the Arima, and the family profited from foreign trade. While Christianity spread greatly, Haruzumi did not like the faith, and persecuted it.

His son Yoshisada succeeded him.