University of Tsukuba was voted as all-arounder coming in high ranks for all 4 areas - 4th in "taking action", 2nd in "interpersonal skills", 5th in "intelligence and knowledge" and 3rd in "creativity". The University has been keeping their education cross-sectional in terms of their curriculum and staying away from specializing in a certain area. On top of this culture, they started a new degree program called "Tsukuba Standard" from 2007 where students can grow their international compatibility. Corporate recruiting staffs says creating this unique educational environment helped Tsukuba's student improve their all-arounder skill-set.
Kyoto University came in 2nd place in the overall ranking, followed by Tokyo University of Agriculture and Technology as 3rd and Osaka University as 4th.Within the top 10 ranking, only Waseda (8th) and Keio (9th) came in from private universities and all others were National Universities.
Details in Japanese; Nikkei article - 2018 university ranking by recruiters