Karthaus's wife, , received a personal reply to a letter written to , the mayor of Otaru, in 1999."OTARU ONSENS PERSONAL REPLY FROM OTARU MAYOR YAMADA KATSUMARO DATED OCTOBER 12, 1999 (translated by Dave Aldwinckle)," Arudou DebitoLetter from Katsumaro Yamada to Yuki Karthaus
