Shin-Chan creator missing?!?

Shin creator Yoshito Usui(51) has been missing for several days. His family reported him missing September 12th, when he didn't return from a hiking trip the day before. No one including his publisher has been in contact with Usui after he left on friday. Police have already lunched a search effort. I hope that he's fine and that the find him soon. Usui is a great mangaka.