
Death on the Mountain
In the news yesterday, a French couple was rescued from Mt. Muka in NE Hokkaido. Sadly, the wife did not make it.
Even in summer, weather changes at altitude can happen quickly, and people can die of hypothermia. As the weather cools and snow begins to fall in the high mountains, this becomes even more of a concern. Great care should be taken to prepare/dress appropriately. The reports say that temperatures were near zero, with wind and sleet falling. Terribly cold conditions.
You can use weather services like weathernews.jp or windy.com to see what the weather might be like in the area. You can use websites/apps like Yamap.com to see what recent trail conditions from hikers' writing and pictures, or even trail conditions a year prior on the date you plan to hike, look like on the trail. There are also mountain guides who are familiar with the terrain and weather and have backcountry medical skills/certifications (some of them frequent this sub, so just ask).