Hirosaki Castle (Hirosaki-jō) is a hirayama-style Japanese castle constructed in 1611. It was the seat of the Tsugaru clan, a 47,000 koku tozama daimyō clan who ruled over Hirosaki Domain, Mutsu Province, in what is now central Hirosaki, Aomori Prefecture, Japan. It was also referred to as Takaoka Castle (Takaoka-jō).
Hirosaki Castle measures 612 meters east-west and 947 meters north-south. Its grounds are divided into six concentric baileys, which were formerly walled and separated by moats. It is unusual in that its Edo period donjon and most of its outline remains intact. Noted historian and author Shiba Ryōtarō praised it as one of the "Seven Famous Castles of Japan" in his travel essay series Kaidō wo Yuku.