Abstract: Presented in the form of a time spiral (a travel already achieved while the film is in the making) and first conceived as a “cinema verite”, The Koumiko Mystery (1965, by Chris Marker, co-produced by the Service de la Recherche of the French Public TV (ORTF) provides, on the occasion of a confrontation with Japan’s opacity, a “decantation” of the nature of travel through a triple unfolding: mythographic critic; autonomy of the recorded material and creation of a new space for vision and listening; language « translation ».