On June 22nd (Tuesday), at Tochigi Prefectural Nasu Seihō High School, we received a request from the high school for a career development support project, and "Hinode Waterworks Co., Ltd." conducted an on-site class. The theme of the lecture was "About Castings and Manhole Covers," and during the 2nd and 3rd periods, a total of 42 participants, including 3rd-year mechanical engineering students and teachers, attended the session.