The Jingbirok: A Memoir of Imjin War(Hangul: 징비록) is a 2015 South Korean television series starring Kim Sang-joong as Ryu Seong-ryong (1542 – 1607) who was a scholar-official of theJoseon Dynasty of Korea. He held many responsibilities including the Chief State Councillor position in 1592. He was a member of the "Eastern faction", and a follower of Yi Hwang. He wrote the Jingbirok a first hand account of the Imjin War. It aired on KBS. 징비록의 저자이자 명재상 류성룡
Here's a Ming Dynasty helmet below now found in a museum in Japan, as it was used in the Imjin War of the 1590s, where Joseon (Korea) and Ming (China) were allied against a Japanese naval invasion of Korea.
Toyotomi Hideyoshi (豊臣 秀吉, February 2, 1536 or March 26, 1537 – September 18, 1598) was a preeminent daimyo, warrior, general, samurai, and politician of the Sengoku period who is regarded as Japan's second "great unifier".
Uesugi Kenshin (上杉 謙信, February 18, 1530 – April 19, 1578) was a daimyo who ruled Echigo province in the Sengoku period of Japan. He was one of the most powerful lords of the Sengoku period. While chiefly remembered for his prowess on the battlefield, Kenshin is also regarded as an extremely skillful administrator who fostered the growth of local industries and trade; his rule saw a marked rise in the standard of living of Echigo.