[Machine Translation] Avoiding accidents and problems while climbing a mountain can also help prevent distress. When we look at the circumstances of accidents that occur during mountain climbing, such as descending after sunset or falling down due to fatigue, we find that in many cases the cause was a failure in planning the mountain trip or a lack of preparation in advance. This section introduces patterns of failure that are likely to occur during mountain climbing, and examines where problems in mountain planning occurred and what preparations were lacking.