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.
Sugiyama could sit and wait for a rescue team or think of some way of getting out by himself. In other words, he had but one real option. Yet any attempt to escape required so much courage it defied the imagination, and this reality was gradually dawning on Sugiyama. He would need courage, and no ordinary courage at that.
Sugiyama may never have thought of a way of escaping had he not discovered the traces left on the walls of the shaft.
A more careful search revealed traces on other parts of the cave as well. The tips of the icicle like stalactites that hung down over the waterside seemed to be chipped, while the flowstone surface was scratched as if brushed by someone's body. The same kind of damage could be seen in various places around the cave. It occurred to Sugiyama that the interior of the cave had been disturbed by a party of explorers from a caving club or other group. Yet he was not aware of any records of this particular site having been discovered. Caving clubs regularly kept in touch; it would have been big news had any unknown cavern been discovered in the Kanto region.
If the cave hadn't been disturbed by humans, concluded Sugiyama, it must have been an animal. It occurred to him that a sizeable animal could have strayed into the cave and wreaked havoc here and there. Sugiyama slapped his knee the instant the idea occurred to him. The mouth of the shaft had been blocked by the boulder. This meant that any animal must have crept into the cave via a different route. He could not imagine where such a route could be located. Yet some secret route had to exist somewhere; it was just that he had overlooked it.
Though he vainly searched the periphery of the cavern, he failed to find even the smallest crevice. He was at a loss as to how to account for the evidence.
Turning off his headlamp, he sank deep in thought. Immersed in the pitch darkness, he concentrated his thoughts and began thinking hard. The inside of the cavern was not totally silent. There was the constant sound of dripping water. The drips ran down the stalactites of limestone that hung from the grotto ceiling, and fell plip-plopping on the subterranean lake below. Even in the darkness, it felt like he could see the droplets as they rippled the surface of the lake. The sound amplified the notion of water in his mind until he realized that water was the key to the puzzle. Wasn't it possible that water was flowing out from the bottom of the subterranean lake? And what were the implications? Opening his backpack and extracting the lens cap of his camera, Sugiyama set it on the surface of the water. The cap began to float from right to left. He tried floating the cap again, but this time in a different place. It moved in the same direction. Wherever he set the cap on the surface of the water, it made its way from right to left. A current of water was flowing at the bottom of the lake. What was more, the current was flowing quite rapidly. Sugiyama finally realized that, although to all appearances the water seemed to be a subterranean lake, it was in fact an underground river.
Since the beginning of November, two typhoons had swept across the Kanto region, bringing heavy rains. As a result the underground water level was higher than usual, and the route leading out from the cave must have sunk under water. Since the water was flowing from right to left, somewhere down toward the left, he concluded, there should be a tunnel through which the water was draining away to the outside world. The current would not be so rapid if the water had no sizeable hole to drain through.
The more he thought about it, the more certain he felt that there was an underwater tunnel. That was all well and good, but he still had to find some way of getting out. Although he had found a route out, it was not as if he could just walk along it.
Sugiyama could not yet summon up the courage to take the first step. Once taken, there was absolutely no turning back, and he could have no way of knowing what awaited him along the way.
How inexpressible would be his joy upon seeing the light of day! When he had been trekking across the mountainside, he noticed that the river winding along the eastern side of the mountain had suddenly vanished. According to Sugiyama's compass, east was left. It seemed a fair conclusion that the underground water was flowing into a river on the eastern side. Since they had been making in an easterly direction ever since entering the cave, it was also probable that he was by now quite close to the opening from which the water was draining out.
He frantically tried to imagine the brilliance of the light, how he'd stumble outside into open space from his imprisonment in the cave. He had to invoke his courage by picturing the joy of feeling the light of day radiating down from above. Yet paradoxically, the greater his desire to get out of there, the stronger his fear and anguish, lest what he so longed for should be snatched from him just short of the end.
Sugiyama was a good skin diver. It was quite possible for him to dive into the dark waters and make his way into the underwater tunnel by feeling the water on his skin and gauging the direction of the current. He had no way of knowing, however, how far the tunnel extended. Once on the current forward, there was absolutely no way back. If he found no exit, there was no coming back. If he ran out of air before reaching the exit, there was no coming back. And even if he did manage to find an opening, there was no telling whether it would be big enough for a man to get through. Imagine the agony of flailing about before a tiny opening, fighting for life. All the distress a man could suffer would suffocate him at once in that final moment. The futility, the anguish, the despair, the physical agony…
If he just sat and waited here, he would be spared that agony. Wait? Wait for what? Several years ago, there had been an incident in which a cave explorer had been rescued four days after going missing in some limestone caves in Okinawa. He had apparently dropped his flashlight and lost his way. In that case, not only did the rescuers kno
w which caves he had been exploring, but local spelunkers also turned out in force to search for him. Even then it had taken a full four days to find and rescue him.
Sugiyama wondered which of two options offered the better chance of survival. It was inconceivable that a rescue party would arrive within a few days. Diving in search of an outlet was no doubt the better option in terms of his chances for survival. The question was whether he was capable of facing the suffering that may lie ahead.
Another two days had elapsed. He had now been trapped for a total of four days.
He could afford no more indecision: it was now or never. All he had eaten during those four days had been a box of biscuits that he always carried in his backpack as a precaution. True, he had lost a great deal of stamina, but still had enough energy left to make the dive, provided he waited no longer. However, his strength would begin to ebb dramatically in another two or three days, whereupon he would no longer have any decision to make, but be left with the default option: a slow but painless death. Any chance of being saved would have run out.
Looking back on his thirty-one years, he began to question whether he had lived a happy life, since the life could be snuffed out at any moment now. Although he would have liked to feel satisfied with the years he'd been given, he felt angry at how thoughtlessly he had lived. There was still so much he wanted to do in life. There were all those adventures that he and his son Takehiko had in store, when his son grew a little older. There was so much he wanted to teach the boy. Sugiyama hoped to instil in him the lessons of life born of his own experiences, so the boy could take advantage of the knowledge and lead a more fulfilling life, supplement the knowledge with his own, and pass it on to the next generation. This, for Sugiyama, was the real meaning of human life. Neither could he help worrying about his wife and the child she was expecting. Yet he would have to try to keep his mind free from such concerns for now. There was no end to the unfinished business that crowded his mind, the insurance settlement, the mortgage, who would take care of his elderly parents, and so on. Still, he wanted to convey his will to his son.
In the fading light of his headlamp, he began to write in the blank space on the back of the map. As if trying to convince himself, he penned each letter and each phrase with firm deliberation. He rolled up the finished letter and put it into an empty film case. He sealed the case with vinyl tape, then inserted it into a waterproof pack on which he had clearly written a name and address. As a final precaution, he sealed the pack and tested it in the water. The test revealed that the little package was both buoyant enough and perfectly water-resistant. What Sugiyama had in mind was what would happen if the outlet was too narrow for him to pass through. If that were the case, he would dispatch the letter to his family in the direction of the opening. He felt that there was little likelihood of it ever reaching outside the cave unless he released it immediately in front of the opening. Even if he managed to push it into the tunnel leading out, there was the risk of the buoyant package getting caught up in the countless stalactites hanging from the roof of the tunnel.
Writing the letter strengthened Sugiyama's resolve. He had to believe that he had a chance. At his best, he could swim about fifty meters underwater without having to surface. With the aid of the current, he could probably cover even more distance. As a precaution against projecting stalactites, he would wear his helmet and keep his overalls and boots on.
Turning his lamp on, he set it on a nearby rock to shine on the left side of the subterranean lake. The light flickered feebly as if it would go out at any second. He gradually lowered himself into the water and waited until he grew accustomed to the cold before submerging his entire body. Swimming over to the left side of the lake, he placed his hand on a ledge and poked his head above water to regulate his breathing. The headlamp on top of the rock was almost out. Sugiyama took several short breaths and filled his lungs with air. The case containing the letter was wedged under his belt so that there was no possibility of losing it. He patted his belt to reassure himself that the letter was still there. The instant he did so, the headlamp went out.
As if this had been his cue, Sugiyama began diving down along the line of the ledge. About six feet down, the current became more vigorous, assailing his face and almost ripping his helmet off. His groping hands found the opening to the tunnel. The water around him was rushing into the tunnel. It was just as he had guessed. His will firm, he entrusted his fate to the current.
Summer 1995
The troupe of twelve pitched base camp on the gentle slope that fronted the entrance to the cave. They were members of the S. University Explorers' Club led by Takehiko Sugiyama.
Although they had been particular about selecting a shaded spot to pitch their tents, no sooner had it passed three in the afternoon than the tents were being directly exposed to searing sunlight. With faces bathed in sweat, the club members shouldered their equipment. Their load consisted not only of caving gear; they also had their full diving equipment to carry, which was no joke. The cars were parked on an empty stretch of ground near the foot of the mountain, about a mile and a half downhill from the camp. Each club member had had to make two roundtrips to carry their two sets of gear uphill.
The screeching of cicadas was so loud that normal conversation was out of the question. The club members devoted their energies to setting up base camp rather than conversing. Their preparations were progressing ahead of schedule. Takehiko gave a satisfied smile as he saw how adroitly the members were handling the preparations. Putting down the tackle he was carrying, he took a brief rest and stretched his back.
The dark mouth of the limestone cave gaped right in front of them. The opening to the grotto had been made wider than it had been back when his father had arrived here two decades earlier. The impenetrable darkness that lay beyond the opening, though, was exactly the same as what his father had witnessed. For Takehiko, the cave was a place that he'd felt destined to visit sooner or later.
Now known by the impressive name of White Rock Caverns, these limestone caves discovered by his father had been visited by dozens of research teams. Until the year before, plans had been made to develop the caves into a tourist attraction under the aegis of the local village administration. However, the plans had been abandoned for the most part. Not only had the project been opposed by local environmental protection groups, but the estimated costs of building roads and other tourist infrastructure had been staggering. Thus the limestone caves had been left untouched. The general public was not allowed to enter the caves. The district forest office granted admission permits only to such official groups as research teams.
The caves were only a three-hour drive from where Takehiko lived. He could have come whenever he wanted. Nor had he lacked specialist friends; he could have dived into the subterranean lake where his father had died whenever he chose.
Takehiko had intentionally kept putting the visit off. Hardly a day had passed during most of his life without him picturing that subterranean lake. It had even figured in his dreams. He had long lost count of the times he had woken in the middle of the night, gasping in panic at the water and darkness as they closed in on him.
At this time in his life, he faced no hardships worth mentioning. It occurred to him that the time had come.
Once summer vacation was over, he would have to cut down on activities with the Explorers' Club, and devote himself instead to completing his undergraduate thesis and finding a job. The following year would see him a busy, gainfully employed member of society. He felt that his visit must happen now or never.
Takehiko had just turned three years old when his father's body had been retrieved from the bottom of the subterranean lake. Children of that age do not even understand the meaning of death. That muscular, vital body he had hugged every day had been there one moment and gone the next; the only sensation he had had was that something familiar had suddenly vanished.
Six months after the two men encountered tragedy in the cave, a local exploratio
n team had chanced upon the body of Sakakibara, the friend of Takehiko's father. Immediately after the grisly discovery, the team had also discovered his father's body while surveying the underground lake. Thus they had finally resolved the incident involving the two men who had gone missing about six months earlier. Even after the team had removed the boulder, Sakakibara's decomposing body had remained dangling there. As the team turned their flashlights on Sakakibara's corpse, they had been aghast to see the calcified back of his crushed skull cleaving as one to the limestone.
The police had explained to his mother that his father's death was probably due to temporary derangement caused by being trapped so long in the darkness'.
What the police meant was that his father had become so mentally confused that he'd drowned himself in the lake. Cases of suicide by drowning are apparently not uncommon among desperate people marooned or adrift at sea for a prolonged period of time. Takehiko's mother refused to accept the conclusion offered by the police, although there was no use in contesting it; it was a point of personal rather than criminal bearing. She did, however, doggedly insist that her husband had not been the kind of man to panic in a crisis. She understood her husband's personality better than most.
The club had completed its preparations for diving in the cave by eleven the next morning. Takehiko and five other members would be the first to dive, while the other six members remained on standby. All team members, including the two female members, were certified scuba divers and had plenty of experience diving at sea. Only three members of the team, however, had cave-diving experience. It was the role of the captain, Takehiko, to initiate the remaining nine members into the mysteries of cave diving.