Seven Warring States; Seven Kingdoms of China
Historical term referring to the seven major states during China's Warring States period (475–221 BCE).
See also: 戦国時代
The Seven Warring States refer to the seven states of Qin, Chu, Qi, Yan, Han, Wei, and Zhao.
戦国時代 can refer to Japan's Warring States period (Sengoku period) or China's Warring States period; 戦国七雄 specifically denotes the seven major Chinese states.
From 戦国 (Warring States) + 七 (seven) + 雄 (powerful leader/state). The term is a direct reference to the seven dominant states of China's Warring States period.