Osaka city university is a public university located in Osaka, Osaka Prefecture. Its predecessor was the Osaka Business Workshop established in Meiji/KOOC-0/3 (/KOOC-0/880) by/KOOC-0/6 Osaka business celebrities represented by the Five Dynasties. Selected into the Graduate School of Excellence Program [1 1], and now it is one of the top comprehensive research-oriented public universities in Japan [8], one of the three established business universities in Japan (Osaka Business University), and the other two are hitotsubashi university (Tokyo Business University) and Kobe University (Kobe Business University). The medical department in osaka city university is also famous, with a deviation of 70.8 [12], and there is also a lot of cooperation with the medical system in Osaka. Osaka city university has eight departments: business, law, literature, economics, science, engineering, medicine and life science. The total campus area is about 150 hectares. [7] osaka city university ranks first in the difficulty of admission among public universities in West Japan, and is also recognized as the most difficult public university in West Japan. In the popularity ranking of Japanese universities in 202 1, it ranks first among public universities [9]. At the same time, it is also the first public university in Japan [10], and its comprehensive strength ranks first among Japanese public universities.