Yamada Nagamasa (山田 長政?, 1590 – 1630) was a Japanese adventurer who gained considerable influence in Ayutthaya kingdom at the beginning of the 17th century and became the governor of the Nakhon Si Thammarat in southern Thailand.
Yamada Nagamasa was born in Numazu in 1590. He is said to have been a palanquin bearer of the lord of Numazu. He became involved in Japanese trade activities with South-East Asia during the period of the Red seal ships and settled in the kingdom of Ayutthaya (modern-day Thailand) from around 1612.
Read more about Yamada Nagamasa: Japanese Settlement in Southeast Asia, Military Involvement and Lordship, Travels Between Siam and Japan, End of Relations Between Siam and Japan, Film Adaptations of Yamada's Life