IHI Corporation , formerly known as Ishikawajima-Harima Heavy Industries Co., Ltd. is a Japanese engineering corporation headquartered in Tokyo, Japan that produces and offers ships, space launch vehicles, aircraft engines, marine diesel engines, gas turbines, gas engines, railway systems, turbochargers for automobiles, plant engineering, industrial machinery, power station boilers and other facilities, suspension bridges and other structures.

Aioi is a city in Hyōgo Prefecture, Japan. As of 31 May 2022, the city had an estimated population of 28,208 in 13143 households and a population density of 310 persons per km2. The total area of the city is 90.4 square kilometres (34.9 sq mi).