Tokugawa Shogunate in the context of "Chōshū Domain"

Aizu Domain (会津藩, Aizu-han) was a domain of the Tokugawa Shogunate of Japan during the Edo period from 1601 to 1871.

The Aizu Domain was based at Tsuruga Castle in Mutsu Province, the core of the modern city of Aizuwakamatsu, located in the Tōhoku region of the island of Honshu. The Aizu Domain was ruled for most of its existence by the shinpan daimyō of the Aizu-Matsudaira clan, a local cadet branch of the ruling Tokugawa clan, but was briefly ruled by the tozama daimyō of the Gamō and Katō clans. The Aizu Domain was assessed under the Kokudaka system with a peak value of 919,000 koku, but this was reduced to 230,000 koku. The Aizu Domain was dissolved in the abolition of the han system in 1871 by the Meiji government and its territory was absorbed into Fukushima Prefecture, covering much of the traditional region of Aizu.

Toyotomi Hideyoshi (豊臣 秀吉; Japanese pronunciation: [to.jo.to.mʲi (|) çi.de(ꜜ).jo.ɕi], 27 March 1537 – 18 September 1598), otherwise known as Kinoshita Tōkichirō (木下 藤吉郎) and Hashiba Hideyoshi (羽柴 秀吉), was a Japanese samurai and daimyō (feudal lord) of the late Sengoku and Azuchi-Momoyama periods and regarded as the second "Great Unifier" of Japan. Although he came from a peasant background, his immense power earned him the rank and title of Kampaku (関白, Imperial Regent) and Daijō-daijin (太政大臣, Chancellor of the Realm), the highest official position and title in the nobility class. He was the first person in history to become a Kampaku who was not born a noble. He then passed the position and title of Kampaku to his nephew, Toyotomi Hidetsugu. He remained in power as Taikō (太閤), the title of retired Kampaku, until his death. It is believed, but not certain, that the reason he refused or could not obtain the title of shogun (征夷大将軍), the leader of the warrior class, was because he was of peasant origin.

Hideyoshi rose from a peasant background as a retainer of the prominent lord Oda Nobunaga to become one of the most powerful men in Japanese history. He distinguished himself in many of Nobunaga's campaigns. After Nobunaga's death in the Honnō-ji Incident in 1582, Hideyoshi defeated his assassin Akechi Mitsuhide at the Battle of Yamazaki and became Nobunaga's successor. He then continued the campaign to unite Japan that led to the closing of the Sengoku period. Hideyoshi became the de facto leader of Japan and acquired the prestigious positions of daijō-daijin and kampaku by the mid-1580s. He conquered Shikoku in 1585 and Kyūshū in 1587, and completed the unification by winning the Siege of Odawara in 1590 and crushing the Kunohe rebellion in 1591. With the unification of Japan complete, Hideyoshi launched the Japanese invasions of Korea in 1592 to initial success, but eventual military stalemate damaged his prestige before his death in 1598. Hideyoshi's young son and successor Toyotomi Hideyori was displaced by Tokugawa Ieyasu at the Battle of Sekigahara in 1600 which would lead to the founding of the Tokugawa Shogunate.

Shinpan (親藩) was a class of daimyō in the Tokugawa Shogunate of Japan who were certain relatives of the Shōgun.

While all shinpan were relatives of the shōgun, not all relatives of the shōgun were shinpan; an example of this is the Matsudaira clan of the Okutono Domain. Non-daimyō relatives, such as the Gosankyō, were also known as kamon – thus the shinpan lords were alternatively known as kamon daimyō (家門大名). Shinpan included the Gosanke, the Matsudaira clan of Aizu and the Matsudaira clan of the Fukui Domain. These branch families were created after the 1600 Battle of Sekigahara; there were 23 shinpan domains, producing a total of approximately 2.6 million koku of rice. Because they were family and thus could wield informal power, they were not permitted to hold official positions in the bakufu. These families could also provide a shogunal successor if necessary.

Edo society refers to the society of Japan under the rule of the Tokugawa Shogunate during the Edo period from 1603 to 1868.

Edo society was a feudal society with strict social stratification, customs, and regulations intended to promote political stability. The Emperor of Japan and the kuge were the official ruling class of Japan but had no power. The shōgun of the Tokugawa clan, the daimyō, and their retainers of the samurai class administered Japan through their system of domains. The majority of Edo society were commoners divided into peasant, craftsmen, and merchant classes, and various "untouchable" or Burakumin groups.

Fudai daimyō (譜代大名) was a class of daimyō (大名) in the Tokugawa Shogunate (徳川幕府) of Japan who were hereditary vassals of the Tokugawa before the Battle of Sekigahara. Fudai daimyō and their descendants filled the ranks of the Tokugawa administration in opposition to the tozama daimyō and held most of the power in Japan during the Edo period.

The Convention of Kanagawa, also known as the Kanagawa Treaty (神奈川条約, Kanagawa Jōyaku) or the Japan–US Treaty of Peace and Amity (日米和親条約, Nichibei Washin Jōyaku), was a treaty signed between the United States and the Tokugawa Shogunate on March 31, 1854. Signed under threat of force, it effectively meant the end of Japan's 220-year-old policy of national seclusion (sakoku) by opening the ports of Shimoda and Hakodate to American vessels. It also ensured the safety of American castaways and established the position of an American consul in Japan. The treaty precipitated the signing of similar treaties establishing diplomatic relations with other Western powers.

Matsumae Takahiro (松前 崇広; December 10, 1829 – June 9, 1866) was a Japanese daimyō (military lord) of the Edo period, who ruled the Matsumae Domain. Though he was a tozama daimyō, he served in the Tokugawa Shogunate as a rōjū. His court title was Izu no kami.