No matter how wrong this sounds, it was actually the vikings.
The first of the "Three Great Unifiers" of Japan was Oda Nobunaga.
russia
Czars
as peacemaker and unifiers
russia
shogunate and daimyo and samurai
Czars
China's first rulers were from the Xia dynasty.
Russia is a complicated place to document. The first four rulers of what was to become the Russian empire were Ryurik, Oleg, Igor, Olga (Igor's wife and Svyatoslav's mother was Regent for Svyatoslav I) and Svyatoslav I. The first ruler to use the title Tsar, was Ivan III (The Great). All previous rulers had used titles like "Grand Duke", "Prince" and "Grand Prince". Subsequent Russian rulers to use the title Tsar were Ivan IV (The Terrible), Fyodor I and Boris Godunov. After the end of the Ryurikid Dynasty and the establishment of the Romanov Dynasty, all Russian rulers were known as Tsar and/or Emperor or Tsarina and/or Empress.
Oda Nobunaga was a famous Japanese daimyo who lived from 1534-1582. He is generally considered to be the first of the "Three Great Unifiers" of Japanese history.
Germany, Italy
Yes, the Shang was the first family rulers in China