Schuh, Johanna Johanna Schuh is the director of the Insightvoice Naikan Center in Vienna, Austria, and specializes in individual Naikan work. She started her Naikan practise in 1993 and has been working as a Naikan guide since 2000. "Naikan - The World of Introspection" is the English version of her German book "Naikan - Die Welt der Innenschau".