There were some events organized by the university, but we only went to a couple organized by the course.
The University had loads of different of sport activities, however we did not engage in them. We trained by ourselves. Although we did participate in a relay race at the University.
We met loads of people outside the University that showed us around and took us to many different places, and accompanied us in our tourist trips around the area of Kansai.
People from the laboratory took us to dinner, in Japan older people, specially if they are your bosses, sensei, will make sure to invite you to dinner, and that you experience the most.
The city of Osaka is huge, it is called the kitchen of Japan, so foodies will have a great time venturing around the endless restaurants.
I am into craft beer so I made sure to visit the different craft beer bars around the city, and there I made loads of friends that showed us around and invited us to different events.