The siege of Tanabe in 1600 was one of a number of battles which took place in parallel to the more influential Sekigahara Campaign, which led to the unification of Japan under Tokugawa Ieyasu.

Saiki Castle was an Edo period yamajiro-style Japanese castle located in the city of Saiki, Ōita Prefecture, Japan. Its ruins have been protected as a National Historic Site since 2023. It is No.194 o