Arimatsu, Aichi

 is a town in Prefecture, Japan. It houses the Arimatsu Station of the Line, roughly southeast of downtown . The town merged into on 1 December 1964, and is now a part of .
The town is known for being the location of the Battle of Okehazama in 1560, where defeated and established himself as one of the front-running warlords in the Sengoku period. The town is also well-known for being the historical centre of , or traditional Japanese tie-dye, and has supported the industry since the 17th century, dating back to 1608.