IHI Corp., Asia's largest jet engine maker, built a fourth production facility for engine parts at its plant in northern Japan to meet demand from commercial airlines, it said Tuesday.

The new facility will make low-pressure turbine parts for engines to power Boeing Co.'s long-range 787 Dreamliner and the bigger 747-8 model, Tokyo-based IHI said in a statement. The facility will produce parts to equip as many as 300 engines, the company said, without giving a time frame.

IHI, which also builds ships, boilers and nuclear parts, recorded a 45 percent gain in operating profit from aerospace, its most profitable unit, for the year that ended on March 31. The company has joined a program to design and produce General Electric Co.'s GEnx engines for new aircraft models.