1. IHI Corporation (formerly Ishikawajima-harima Heavy Industries Co., Ltd. (April 2004)
2. National Institute of Information and Communications Technology (April 2004)
3. Komatsu Ltd. (September 2004)
4. NHK Spring Co., Ltd. (September 2004)
5. National Institute for Environmental Studies (March 2005)
6. Yokohama City and Yokohama City Council of Social Welfare (April 2005) 　　*Three-party agreement
7. MUFG Bank, Ltd. (formerly Tokyo Mitsubishi Bank, Ltd.) (May 2005)
8. Japan Bank for International Cooperation (June 2005)
9. Nissan Motor Co., Ltd. (February 2006)
10. Yokohama City University (March 2006)
11. Port and Airport Research Institute (July 2006)
12. The Yokohama Chamber of Commerce and Industry (September 2006)
13. National Maritime Research Institute (January 2007)
14. Institute for Global Environmental Strategies (March 2007)
15. The High Pressure Gas Safety Institute of Japan (October 2007)
16. Advanced Telecommunications Research Institute International (March 2008)
17. Research Institute for Ocean Economics (May 2008)
18. National Institute of Technology and Evaluation (December 2009)
19. Japan Agency for Marine-Earth Science and Technology (January 2010)
20. Japan International Cooperation Agency (April 2010)
21. The National Research and Development Agency, Japan Fisheries Research and Education Agency (formerly Fisheries Research Agency) (August 2011)
22. Hodogaya Ward, Yokohama City (February 2013)
23. Yokohama City (June 2013)
24. Sagamihara City (August 2015)
25. East Nippon Expressway Company Limited, Kanto Office (December 2015)
26. Metropolitan Expressway Company Limited (December 2015)
27. Rikkyo University (March 2016)
28. Urban Renaissance Agency (Independent Administrative Agency), East Japan Rental Housing Office (March 2016)
29. Sotetsu Holdings, Inc. (April 2016)
30. United Nations Development Programme (June 2016)
31. Office of the United Nations High Commissioner for Refugees (October 2016)
32. Kanagawa Prefecture (January 2017)
33. Kanagawa Bar Association(February 2017)
34. Kanagawa Institute of Industrial Science and Technology (April 2017)
35. Fuji Xerox Co., Ltd. (May 2017)
36. Kanto Gakuin University (August 2017)
37. Japan Finance Corporation, Yokohama Branch (September 2017)
38. Kawasaki City (January 2018)
39. Hakone Town (February 2018)
40. Yokohama Customs (March 2018)
41. Central Nippon Expressway Company Limited Tokyo Branch (May 2018)
42. Minamiashigara City (May 2018)
43. The Bank of Yokohama,Ltd. (October 2018)

*As of April 2019