The mountain is now a historical park, containing various castle ruins, including water wells and stone walls,[2] in addition to artifacts dating further back.

It was built by the warlord Oda Nobunaga to facilitate his conquest of Mino Province, later reused by Tokugawa Ieyasu in his struggle for hegemony over Toyotomi Hideyoshi.

[3] Komakiyama Castle is located on Mount Komaki, an isolated 86 m-high (282 ft) high hill in the center of the Nōbi Plain in central Owari Province.

[2] After Oda Nobunaga defeated Imagawa Yoshimoto at the Battle of Okehazama in 1560, securing his eastern borders, he turned his attention to the conquest of Mino Province to the north.

It houses the Komaki City Historical Museum with examples of samurai armor, Japanese swords and early firearms, roof tiles, and other artifacts uncovered during excavations in the castle grounds.