Hokkaido's Mount Fuji
When the sky does clear it's an inspiring sight, rising from the snow-blanketed landscape of Shikotsu-Toya National Park; the peak is often referred to as Hokkaido's Mount Fuji.
Kerr has skied Yotei's crater more than 70 times.
That sounds like a lot but over the seven years the former New Zealand ski patrolman has been in the region it equals only around 10 trips a year.
The earliest time in the season he's managed it was early March.
Usually there's too much snow until late February.
Snowshoes and avalanche equipment are necessary to climb the mountain, with the ascent taking between five to seven hours depending on weather conditions and fitness level of the skiers.
From the ridge of the crater, the nearby resorts, runs and forests of snow-covered pine and silver birch can be seen stretching into the distance.
"The run is not the most epic but it is the best snow conditions you'll find for any backcountry skiing," says Kerr.
Usually skiers will only get one or two runs into the crater, which is a few hundred meters long.
"It can be done in around 15 to 20 seconds," says Kerr.
"But then you get to ski down the outside of the mountain, which can take around an hour."
It's potentially dangerous, as all backcountry skiing can be, says Kerr, with the threat of avalanches real.
However, Kerr says any snowboarder or skier who can do the runs in the regular ski resorts can manage Yotei.