The Shimazu clan (島津氏, Shimazu-shi; Japanese pronunciation: [ɕiꜜ.ma.(d)zɯ, ɕi.ma.(d)zɯꜜ.ɕi]) were the daimyō of the Satsuma han, which spread over Satsuma, Ōsumi and Hyūga provinces in Japan.
The Shimazu were identified as one of the tozama or outsider daimyō families in contrast with the fudai or insider clans which were hereditary vassals or allies of the Tokugawa clan.
The Satsuma Domain (薩摩藩, Satsuma-han Ryukyuan: Sachima-han), briefly known as the Kagoshima Domain (鹿児島藩, Kagoshima-han), was a domain (han) of the Tokugawa shogunate of Japan during the Edo period from 1600 to 1871.
The Satsuma Domain was based at Kagoshima Castle in Satsuma Province, the core of the modern city of Kagoshima, located in the south of the island of Kyushu. The Satsuma Domain was ruled for its existence by the Tozama daimyō of the Shimazu clan, who had ruled the Kagoshima area since the 1200s, and covered territory in the provinces of Satsuma, Ōsumi and Hyūga. The Satsuma Domain was assessed under the Kokudaka system and its value peaked at 770,000 koku, the second-highest domain in Japan after the Kaga Domain.
Daimyo (大名, daimyō; English: /ˈdaɪm.joʊ/, Japanese: [dai.mʲoꜜː] ) were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji period in the middle 19th century, ruled most of Japan from their vast hereditary land holdings. They were subordinate to the shogun and nominally to the emperor and the kuge (an aristocratic class). In the term, dai (大) means 'large', and myō stands for myōden (名田), meaning 'private land'.
From the shugo of the Muromachi period through the Sengoku period to the daimyo of the Edo period, the rank had a long and varied history. The backgrounds of daimyo also varied considerably; while some daimyo clans, notably the Mōri, Shimazu and Hosokawa, were cadet branches of the Imperial family or were descended from the kuge, other daimyo were promoted from the ranks of the samurai, notably during the Edo period.
The Seiwa Genji (清和源氏; Japanese pronunciation: [sei.wa ɡeꜜɲ.dʑi, seː-]) 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 members, including Minamoto no Yoshitsune, Minamoto no Yoritomo, the founder of the Kamakura shogunate; and Ashikaga Takauji, the founder of the Ashikaga shogunate, belonged to this line. Tokugawa Ieyasu (1543–1616), founder of the Tokugawa shogunate, also claimed descent from this lineage. The family is named after Emperor Seiwa, whose four sons and twelve grandsons founded the Seiwa Genji. Emperor Seiwa was father of Imperial Prince Sadazumi (貞純親王 Sadazumi Shinnō) (873–916), who was in turn the father of Minamoto no Tsunemoto (源経基) (894–961), one of the founders of the Seiwa Genji, from whom most Seiwa Genji members are descended. Many samurai families belong to this line and used "Minamoto" clan name in official records, such as the Ashikaga, Hatakeyama, Hosokawa, Imagawa, Mori, Nanbu, Nitta, Ogasawara, Ōta, Satake, Satomi, Shiba, Takeda, Toki and the Tsuchiya, among others. The Shimazu and Tokugawa clans also claimed to belong to this line.
A group of Shinto shrines connected closely with the clan is known as the Three Genji Shrines (源氏三神社 Genji San Jinja).
Shimazu Nariakira (島津 斉彬; Japanese pronunciation: [ɕiꜜ.ma.(d)zɯ | na.ɾʲi.aꜜ.kʲi.ɾa], April 28, 1809 – August 24, 1858) was a Japanese feudal lord (daimyō) of the Edo period, the 28th in the line of Shimazu clan lords of Satsuma Domain.
He was renowned as an intelligent and wise lord, and was greatly interested in Western learning and technology. He was enshrined after death as the Shinto kami Terukuni Daimyōjin (照国大明神) in May 1863.