The {{nihongo, Mori clan, 森氏, Mori-shi was a family of

Japanese people The are an East Asian ethnic group native to the Japanese archipelago."人類学上は，旧石器時代あるいは縄文時代以来，現在の北海道〜沖縄諸島（南西諸島）に住んだ集団を祖先にもつ人々。" () Jap ...

descended from the

Seiwa Genji The is a line of the Japanese Minamoto clan that is descended from Emperor Seiwa, which is the most successful and powerful line of the clan. Many of the most famous Minamoto warriors, including Minamoto no Yoshiie, Minamoto no Yoritomo, the foun ...

. Their line descended from

Minamoto no Yoshiie Minamoto No Yoshiie (源義家; 1039 – 4 August 1106), also known as Hachimantarō, was a Minamoto clan samurai of the late Heian period, and '' Chinjufu-shōgun'' (Commander-in-chief of the defense of the North). The first son of Minamoto ...

(also known as Hachimantaro) through his seventh son, Minamoto no Yoshitaka, proprietor of Mōri-no- shō in

Sagami Province was a province of Japan located in what is today the central and western Kanagawa Prefecture. Nussbaum, Louis-Frédéric. (2005). "''Kanagawa''" at . Sagami Province bordered the provinces of Izu, Musashi, and Suruga. It had access to the Paci ...

. His son, Minamoto no Yoritaka, took Mori as his surname when he retired, and Yoritaka's son Yorisada continued to use the surname. During the

Sengoku period The was a period in History of Japan, Japanese history of near-constant civil war and social upheaval from 1467 to 1615. The Sengoku period was initiated by the Ōnin War in 1467 which collapsed the Feudalism, feudal system of Japan under the ...

, the Mori served under

Oda Nobunaga was a Japanese ''daimyō'' and one of the leading figures of the Sengoku period. He is regarded as the first "Great Unifier" of Japan. Nobunaga was head of the very powerful Oda clan, and launched a war against other ''daimyō'' to unify ...

Mori Yoshinari was a Japanese samurai of the Sengoku period and the head of the Mori clan (Genji) family, who served the Saitō clan. The Saitō were the lords of Mino province. Later, he become a retainer of Oda Nobunaga. Military life In 1547, he fought ...

fought with Nobunaga for Kiyosu Castle, and with his son Mori Yoshitaka joined the campaigns against the

Saitō Saitō, Saito, Saitou or Saitoh (written: or ) are the 20th and 21st most common Japanese surnames respectively. Less common variants are , , and . Notable people with the surname include: *, Japanese sailor *, Japanese women's footballer *, Jap ...

Azai The , also rendered as Asai, was a Japanese clan during the Sengoku period. History The Azai was a line of ''daimyōs'' (feudal lords) seated at Odani Castle in northeastern Ōmi Province, located within present day Nagahama, Shiga Prefecture. ...

, and Asakura. Father and son died in the battle against the Azai-Asakura armies, and

Mori Nagayoshi was a samurai officer under the Oda clan following Japan's 16th-century Sengoku period, and the older brother of the famous Mori Ranmaru. His wife Ikeda Sen, was the daughter of Ikeda Tsuneoki. Nagayoshi was known to have such a bad temper and ...

, second son of Yoshinari, became head of the house. Yoshinari's son Nagasada, known as

Mori Ranmaru , also known as Mori Naritoshi (森成利), was the son of Mori Yoshinari, and had 5 brothers in total, from the province of Mino. He was a member of the Mori Clan, descendants of the Seiwa Genji. Biography From an early age, Ranmaru was an a ...

, died with Nobunaga in the

Incident at Honnō-ji Incident may refer to: * A property of a graph in graph theory * ''Incident'' (film), a 1948 film noir * Incident (festival), a cultural festival of The National Institute of Technology in Surathkal, Karnataka, India * Incident (Scientology), a ...

. The family became ''

daimyō were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji era, Meiji period in the middle 19th century, ruled most of Japan from their vast, hereditary land holdings. They were subordinate to the shogun and n ...

s'' under

Toyotomi Hideyoshi , otherwise known as and , was a Japanese samurai and ''daimyō'' (feudal lord) of the late Sengoku period regarded as the second "Great Unifier" of Japan.Richard Holmes, The World Atlas of Warfare: Military Innovations that Changed the Cour ...

, and for five generations headed the

Tsuyama Domain was a Japanese domain of the Edo period. It was associated with Mimasaka Province in modern-day Okayama Prefecture.Mimasaka Province or was a province of Japan in the part of Honshū that is today northeastern Okayama Prefecture. Mimasaka bordered Bitchū, Bizen, Harima, Hōki, and Inaba Provinces. Mimasaka was landlocked, and was often ruled by the ''daimyō'' in Bizen. ...

as ''tozama'' daimyō. Nagayoshi had lost his life in the

Battle of Komaki and Nagakute The was a series of battles in 1584 between the forces of Hashiba Hideyoshi (who would become Toyotomi Hideyoshi in 1586) and the forces of Oda Nobukatsu and Tokugawa Ieyasu. Hideyoshi and Ieyasu had both served Oda Nobunaga and had not previou ...

. Their descendants became

viscount A viscount ( , for male) or viscountess (, for female) is a title used in certain European countries for a noble of varying status. In many countries a viscount, and its historical equivalents, was a non-hereditary, administrative or judicial ...

s in the Meiji peerage.

Sources

This article is based on 森氏 (''Mori-shi'') in the Japanese Wikipedia, retrieved on November 28, 2007. Japanese clans Minamoto clan