(Reuters) - Chateau owner Jean-Pierre Amoreau is a celebrity in Japan -- a privilege he owes to a wine-obsessed cartoon he had never heard of until diehard fans started calling him at home.Amoreau, owner of the Puy Chateau near the village of Saint-Cibard in southwestern France, said he did not know what to think last year when he started getting calls from Japanese buyers who wanted to buy his 2003 growth bottles at any cost.