1.
Warring States period; Sengoku period
A turbulent era of Japanese history roughly spanning from the Onin War (1467) to the establishment of the Tokugawa shogunate (1615), characterized by constant civil war, social upheaval, and the rise of powerful regional warlords.
戦国時代の武将に興味がある。
I'm interested in warlords of the Warring States period.
戦国時代を舞台にしたドラマは人気がある。
Dramas set in the Warring States period are popular.
戦国時代には各地の大名が天下統一を目指して争った。
During the Warring States period, regional lords across the country fought each other to unify the nation.
Composed of 戦国 (warring states) + 時代 (era, period). The three great unifiers of this era are 織田信長, 豊臣秀吉, and 徳川家康. This period is enormously popular in Japanese culture — it is the setting for countless NHK 大河ドラマ (historical dramas), video games, anime, and manga. Common collocations: 戦国時代の武将 (Sengoku warlord), 戦国時代好き (Sengoku history enthusiast). Note: China also has a 戦国時代 (475–221 BC), so context determines which is meant, though the Japanese period is assumed in most Japanese contexts.