Willem Visser
Executive Coach, Strategic Adviser, International Lecturer, 8th dan Judo IJF,  9th Dan Judo AJBA and four-time Olympic Coach in Judo.
 With gratitude to all my teachers, specialists, colleagues and especially all the judoka that I was allowed to guide and to coach.Â
Sources and inspiring professionals:Â
Van der Horst, Cobben, Abe, Saitoh, Yamashita, Uemura, Sugawara, Murata, Hosokawa, Komata, Takahashi, Nakamura, Kasuga, Kawashima, Kariya, Brousse, Besson, RougĂ©, Ruska, Geesink, de Cree, Barta, Vachun, Viser, Lascau, McConnell, Snijders, Sins, Hoogendijk, Boersma, Odinot, van Dijk, Klok, Landsberg, Covey, de Waal, DeCaluwe, Drucker, Franzen, Goldratt, Hammer, Kets de Vries, Kotler, Mastenbroek, Mintzberg, Peters, Porter, Quinn, ten Bos, Trompenaars, Vinke, Weggeman, Wissema and many others.Â