Genghis KhanGenghis Khan (born Temüjin; 1162 – 25 August 1227), also known as Chinggis Khan, was the founder and first khagan of the Mongol Empire, which later became the largest contiguous land empire in history. Having spent the majority of his life uniting the Mongol tribes, he launched a series of military campaigns that conquered large parts of China and Central Asia. Born between 1155 and 1167 and given the name Temüjin, he was the oldest child of Yesugei, a Mongol chieftain of the Borjigin clan, and his wife Hoelun of the Olkhonud clan.
BalhaeBalhae (Korean: 발해; pa̠ɽɦɛ̝, , Бохай, ), also rendered as Bohai, was a multi-ethnic kingdom established in 698 by Dae Joyeong (Da Zuorong) and originally known as the Kingdom of Jin (震, Zhen) until 713 when its name was changed to Balhae. At its greatest extent it corresponded to what is today Northeast China, the northern half of the Korean Peninsula and the southeastern Russian Far East. Balhae's early history involved a rocky relationship with the Tang dynasty that saw military and political conflict, but by the end of the 8th century the relationship had become cordial and friendly.
Japanese era nameThe Japanese era name, also known as gengō, is the first of the two elements that identify years in the Japanese era calendar scheme. The second element is a number which indicates the year number within the era (with the first year being "gan"), followed by the literal "nen" meaning "year". Era names originated in 140 BCE in China, during the reign of the Emperor Wu of Han. As elsewhere in East Asia, the use of era names was originally derived from Chinese imperial practice, although the Japanese system is independent of the Chinese, Korean, and Vietnamese era-naming systems.
Emperor Wu of HanEmperor Wu of Han (156 – 29 March 87 BC), formally enshrined as Emperor Wu the Filial (), born Liu Che (劉徹) and courtesy name Tong (通), was the seventh emperor of the Han dynasty of ancient China, ruling from 141 to 87 BC. His reign lasted 54 years – a record not broken until the reign of the Kangxi Emperor more than 1,800 years later and remains the record for Han Chinese emperors. His reign resulted in a vast expansion of geopolitical influence for the Chinese civilization, and the development of a strong centralized state via governmental policies, economical reorganization and promotion of a hybrid Legalist–Confucian doctrine.
Taejo of JoseonTaejo of Joseon (11 October 1335 – 24 May 1408), personal name Yi Seong-gye (), later Yi Dan (), was the founder and first ruler of the Joseon dynasty of Korea. After overthrowing the Goryeo dynasty, he ascended to the throne in 1392 and abdicated six years later during a strife between his sons. During the Korean Empire, he was honored as Emperor Go. Taejo emphasized continuity over change. No new institutions were created and no massive purges occurred during his reign.
NaruhitoNaruhito is Emperor of Japan. He acceded to the Chrysanthemum Throne on 1 May 2019, beginning the Reiwa era, following the abdication of his father, Akihito. He is the 126th monarch according to Japan's traditional order of succession. Naruhito was born in Tokyo during the reign of his grandfather Hirohito as the eldest child of Crown Prince Akihito and Crown Princess Michiko. Emperor Hirohito died in 1989, at which point Akihito became emperor and Naruhito became the heir apparent.
Korean imperial titlesImperial titles were used in various historical Korean states before the 14th century and at the turn of the 20th century: Early Korean states used "great king", "greatest king", and "holy king"; later Korean states used "emperor". Korean monarchs who used imperial titles had political and religious authority over a realm or domain. The Chinese concept of tianxia, pronounced "cheonha" in Korean, was variously adopted and adapted to Korean views of the world from period to period.
