Olivier Reigen Wang-Genh has been practising Sôtô Zen since 1973. He was ordained a monk by Master Taisen Deshimaru in March 1977 and practised many sesshins with him. He practised for nine years in the Strasburg dojo and was very active in its development and, in 1986, he became head of the dojo.
In 1987, with the help of German practitioners, he started to set up dojos in the main towns of Baden-Wurtemberg and Alsace. The Strasburg dojo thus became a regional Zen centre.
He started ordaining monks and nuns in 1992 and a sangha (community) developed naturally, with several hundred lay and ordained members. Then, in April 1999, with the help of the regional sangha, he founded the Kosan Ryumon-Ji temple at Weiterswiller in Alsace. Around fifteen monks and nuns decided to join him to practise the monastic life, following the traditional rules of a Sôtô Zen monastery.
Olivier Reigen Wang-Genh received Dharma transmission in 2001 from Master Dosho Saikawa, the current head of Sôtô Zen in South America.
In June 2007, he became president of the Buddhist Union of France, a federation that brings together Buddhist schools in France. He is also Vice-President of the International Zen Association.
He thus continues the development of Buddhism and Sôtô Zen in particular, in France and Europe.