UNIVA Oak Holdings Ltd. engages in the investment banking business. It operates through the following business segments: Finance, Clean Energy, Mobile, and Others. The Finance segment handles investment banking and asset management businesses. The Clean Energy segment plans and sells solar power generation equipment. The Mobile segment operates mobile phone stores and provides Wi-Fi rental services. The Others segment includes community FM broadcasting business. The company was founded in 1868 and is headquartered in Tokyo, Japan.