There could be no denying that his situation was desperate. It was like being trapped under a manhole capped with a one-ton manhole cover. Sugiyama was a trapped rat.
He felt he'd been there in the darkness much longer than just two days. He had spent the first few hours after being trapped floundering about trying to find a way out, wasting a good deal of time and energy. Now that he'd been there for a full forty-eight hours, he was huddled up almost motionless by the waterside, resigned to the fact that he had but two options, and only two options. The problem was which to choose. It had occurred to him that he could try pushing up the boulder blocking the mouth of the shaft. Yet he'd already tried to move it and knew just how much it weighed. It had taken every ounce of his and Sakakibara's energy as they had strained in unison. There was no way he could push that boulder up while dangling in the pit with no foothold. Moreover, Sakakibara's corpse was dangling down from his trapped head, blocking any space there may have been. The corpse prevented him from even reaching the boulder, and Sugiyama didn't have the courage to pull Sakakibara's gradually chilling body down from between the boulder and the shaft's edge.
Giving up the idea of getting out through the shaft, Sugiyama decided to focus on the opposite direction, making his way downward. In any direction he looked, the interior of the limestone cavern was intricately configured like a labyrinth. It might conceivably be possible to find a way out by a different route. Yet he ended up in a tubular cavern with a radius of about thirty feet. The low portion of the sloping floor was flooded with underground water, forming a subterranean lake. Whichever route he followed ended up at this subterranean lake. He vainly searched every nook and cranny along the edge of the lake for a passageway to another chamber. He realized he was trapped in a sealed cave.
For the past ten hours, he had not switched on his headlamp except to glance at his watch. Although he carried two headlamps, he had long switched over to the spare and could not afford to waste a second's worth of power.
It was now Tuesday afternoon - half past five. Under normal circumstances, he would have been getting ready to leave work and head for home.
He made it a rule to have supper with his family at least three times a week. No sooner would he open the front door of his home than his son Takehiko would come running up to him. Sugiyama loved to hear his son as he tried to enunciate the words he'd just learned. As he lifted his son into his arms, the boy would utter faltering sounds in an attempt to give his father an account of every little thing that had happened that day. The moments offered great relief and comfort to Sugiyama. The desire to experience the joy of those moments inspired him with the energy he needed to finish up work quickly so he could return home.
Sugiyama remembered that his wife had wanted him to take the oil heater out of storage. He had put the bulky oil heater at the back of the closet and it was more than his wife could handle. It would soon be getting chilly, and all he could think about now was that his wife and son might feel the cold. It was the only heater they had, and he simply couldn't get it out of his mind. He regretted not having taken it out for them before setting out on Sunday morning. It was very cold inside the cave, although temperatures were supposed to remain constant throughout the year. It was probably under fifty degrees where he was at that moment. Although it was odd that anyone in such a predicament should be worrying about others, it didn't occur to him that it was incongruous.
Sugiyama felt the urgent need to get out of there, fuelled by an irresistible desire to get back to his family. Once again he pondered all the conceivable possibilities open to him. Although he knew he had covered everything over and over again in his head, there was always the possibility that he may have overlooked something.
He had told his family on the morning of the day before setting out that he was going 'for a little hike in the mountains'. He had said nothing about exploring limestone caves. Sakakibara had come to pick him up and they had gone as far as the woodland road at the foot of Mt Shiraiwa. There they parked the car and walked three or four miles in the countryside before stumbling upon the entrance to the cave. Sugiyama wondered if Sakakibara had told anyone that he was heading this way. It was unlikely. After all, he had lived alone and had no one to tell. They had made no plans to explore any caves; their original purpose had just been to hike in the mountainside to look for new caves.
Given to worrying at the best of times, his wife would be in quite a state by now. She would no doubt have imagined the worst and called the police a long time ago. Yet how could the police go about searching for them? Their only possible clue would be the car left at the side of the road, although there was little chance of the police even finding the car. Supposing they'd found the car, it was all but inconceivable that any rescue party would come his way. Not only was the limestone cave unmarked on the map, its very existence was unknown.
It was impossible to avoid the conclusion that the chances of rescue from outside were extremely low. The only alternative was for him to find a way out.