Osaka University , abbreviated as OU or Handai (阪大), is a national research university in Osaka, Japan. The university traces its roots back to Edo-era institutions Tekijuku (1838) and Kaitokudo (1724), and was officially established in 1931 as the sixth of the Imperial Universities in Japan, with two faculties: science and medicine. Following the post-war educational reform, it merged with three pre-war higher schools, reorganizing as a comprehensive university with five faculties: science, medicine, letters, law and economics, and engineering. After the merger with Osaka University of Foreign Studies in 2007, Osaka University became the largest national university in Japan by undergraduate enrollment.