The short answer is no—there are no ancient Terracotta Warriors in Japan. The world-famous Terracotta Army is exclusively located in the People's Republic of China.
The army was discovered in 1974 by farmers digging a well near Xi'an. It guards the mausoleum of Qin Shi Huang (259–210 BCE), the first emperor to unify China. The site comprises three massive pits containing over 8,000 life-sized soldiers, 130 chariots with 520 horses, and 150 cavalry horses—each with unique facial features, hairstyles, and armor detailing reflecting actual military ranks.
Japan has its own rich tradition of ceramic sculpture, most notably haniwa—terracotta clay figures buried with elite tombs during the Kofun period (c. 250–538 CE). While visually distinct (haniwa are simpler, cylindrical, and represent houses, animals, and people), the shared medium of "terracotta" and "buried figures" occasionally causes mix-ups.
While the originals never leave China (a few travel for tightly controlled museum exhibitions), high-quality replicas are displayed worldwide, including in Japanese museums like the Tokyo National Museum or the Miho Museum. These exhibitions offer a chance to appreciate the craftsmanship without traveling to Xi'an.
If you want to stand before the actual 2,200-year-old guardians of China's First Emperor, book a flight to Xi'an Xianyang International Airport (XIY). Japan offers its own magnificent archaeological treasures—just not the Terracotta Army.