Among them was Kiyokazu Tokoro from nearby Aichi prefecture , whose son , Yuki , was hiking on the volcano with his girlfriend . NEW : `` Please help us , '' says a father seeking information on his missing son . He is referring to the case of an 8-year-old boy who disappeared from his home in New York City last month and was found dead two days later at a park near where he lived. Seismologists warn that another big eruption could take place in the coming days . Mount Ontake began erupting Saturday , unleashing a cloud of ash that engulfed hikers .
NEW : `` Please help us , '' says a father seeking information on his missing son . He is referring to the case of an 8-year-old boy who disappeared from his home in New York City last month and was found dead two days later at a park near where he lived. Seismologists warn that another big eruption could take place in the coming days . Mount Ontake began erupting Saturday , unleashing a cloud of ash that engulfed hikers .