Toyo Seikan Group is a company that utilizes materials such as metal, plastic, paper, and glass to provide the world with high-quality, highly functional containers. WELLBAG introduced here is an innovative spheroid culture tool, which can easily produce a large number of uniform size spheroids. The well gas permeable film used in WELLBAG also facilitates cell respiration. Furthermore, the high safety required for cell culture bags is realized. This year, we will exhibit WELLBAG in standard and scaled-up sizes, as well as Automated Culture Medium Exchange System.