International Symposium
- The 1 st International Symposium
- November 27, 2007, Sendai Excel Hotel Tokyu -
- The 2 nd International Symposium
- July 14 - 15, 2008, Sendai Excel Hotel Tokyu -
- The 3 rd International Symposium
- July 13 - 14, 2009, Sendai Excel Hotel Tokyu -
- The 4 th International Symposium
- July 7 - 8, 2010, Sendai Excel Hotel Tokyu -
- The 5 th International Symposium
- February 22 - 24, 2012, The Westin Sendai -