While still a student, he traveled throughout Europe. As a professional, after his travels to the University of Ghana, Accra (1978-1980) and Georgetown University, Washington DC U.S.A. (1980-1981), he routinely travels to Paris, and works in Ste-Geneviève Library in the “Quartier Latin”, or in the former National Library situated was in the “rue de Richelieu” or in the new François Mitterrand Building.
In summer 1997, he traveled to Freiburg am Breisgau, Germany, where he makes contact with his university, and in 1978, he attends an intensive German course at the Goethe Institute, in the city of Frankfurt on Main. In 1999, he visits Saarbrücken, the capital of Sarrland. In September 2000, he attended an advanced course of German at the Goethe Institute of Rothenburg ob der Tauber. He finally graduated in German Language in 2003.
In summer 2004, after some research in the François Mitterrand Library in Paris, he went to Freiburg am Breisgau, and then visited Todtnauberg, a small village in the mountainous region of the Black Forest, where the philosopher Martin Heidegger had his refuge and could naturally go full “circular route” through the mountain.
In 2005, he traveled again to Germany, reaching Schillerstadt in Marbach am Neckar, 25 kilometres in the North of Stuttgart, for a research on Heidegger’s personnel file, with the purpose of writing a book about his work. Back to Paris, on the 17th August 2005, he pleased to approach the poetic thought of René Char. The Bastile Theatre, whose façade had placed a great poet’s verse creator, one could read: “Lucidity is the wound closest to the sun.” (“La lucidité est la blessure la plus rapprochée du soleil”) With this statement he understood why this poet, who had inspired the philosopher Martin Heidegger, encouraged to emphasize his interest in poetry and assured him, in the presence of Jean Beaufret and other guests, that: “The poem has no memory, all that the people ask me, is to go ahead”.
In summer 2006, he traveled back to Marbach am Neckar to continue his research visited Berlin, a modern town which represents the evolution of the contemporary Germany.
In July 2007, after a brief stay in Paris working in the François Mitterrand National Library, he travelled again to Marbach am Neckar and visited Bonn and Köln.
In August 2008, he remained in Marbach am Neckar, to conclude the research on ” Martin Heidegger letters to Jean Beaufret” whose content is one of the important chapters of his book Heidegger gegen Heidegger (Heidegger against Heidegger).
In July 2009, he carried out a little research on Agyptisches Totenbuch, translated and commented by Gregoire Kolpaktchy in comparison with Das totenbuch der Ägypter, translated and introduced by Erik Hordnung, in the philosophy Library of the “Institut für Christliche Weltanschauung und Religionsphilosophie” of the München University, Bayern, Germany.
In July 2010, while at the University “Notre Dame de la Paix”, in Namur, Belgium, where his daughter Silvia Nkogo was doing her studies in biological Sciences, he got in contact whit the Department of Philosophy, and in November of the same year, he presented his work Le génie des Ishnago, synthèse systématique de la philosophie africaine in this Department.
In August 2011, he visited the “Musée d´Histoire Naturelle”, of the “Institut Royal des Sciences Naturelles”, in Brussels, Belgium, where he contempleted and admired the “Ishango bones” (“les bâtons des Ishango”).
In October 2011, he participated in the Fair of the Book, in Le Mans, in France. Back to Paris, he continued his research in the François Mitterrand National Library.