The Tokyo University of Foreign Studies is proud to organize the 10th International Workshop on Theoretical East Asian Linguistics (TEAL-10) at Tokyo University of Foreign Studies(TUFS), Tokyo, Japan on June 13-14 (Saturday and Sunday), 2015. The TEAL Workshop was first launched in 1990 at the University of California, Irvine as a mid-size workshop intended to foster research on East Asian linguistics. It has been an important forum for presenting new theories and exchanging novel ideas that bear on East Asian languages with theoretical interests. Since 2002, the TEAL Workshop has been an international event. It was held at Doshisha University, Japan in 2002, National Tsing Hua University, Taiwan in 2004, at Harvard University, USA in 2005, at the Hong Kong Polytechnic University, Hong Kong in 2007, at Potsdam University, Germany in 2008, at Peking University, China in 2010, at Hiroshima University, Japan in 2012, at National Tsing Hua University, Taiwan in 2013, and most recently at the University of Nantes, Nantes in 2014.