Question: In what year did the eruption occur that laid down the lava upon which a famous forest visible from the Tenjō-Yama Park Mt. Kachi Kachi Ropeway? 
Sentence (from "Tenjō-Yama Park Mt. Kachi Kachi Ropeway"): Opened in 1959, the line climbs Mount Tenjō from the shores of Lake Kawaguchi, one of the Fuji Five Lakes.
Relevant evidence: No