The PT-11-class, PT-15 (PT-815) was the fifth of its class which was built in the 1970s as part of the 3rd Defense Plan. The class improved on the previous PT-10 class with advanced technologies. She had a length of 35m, a width of 9.2m, a displacement of 100 tons, and was equipped with four 53cm torpedoes and two Bofors 40mm guns. Her aluminum V-shaped hull and her CODAG engines gave her excellent speed and maneuverability. She could reach 40 knots and operated in the Maizuru and Ominato districts until she was retired in 1995.

It was introduced in Update 1.89 "Imperial Navy". As a torpedo motor boat, the PT-815 is one of the most advanced Japanese patrol vessels, second only to the PG-822. It has a high speed, a powerful armament, and excellent torpedoes. The Type 72 torpedo is its main weapon, capable of reaching 120 km/h and delivering 300 kg TnTe to targets up to 10 km away. This makes the PT-815 very effective against larger ships at medium and long distances. The vessel also has two 40 mm Bofors guns, which offer decent firepower but have a lower rate of fire than the Bofors-Breda variant used by the Freccia-class and Jaguar-class PTs.