"Kurobuchi Village is not a popular attraction, but it was once a well-known resort, with shops and hostels lined up here. As a result, the Kubo Ryokan has a decent number of visitors and a decent amount of revenue. Sayuki Kubo said. But three years ago, the hot springs suddenly stopped gushing... The villagers tried many ways but could not get the hot spring back to the village, and the result of the expert's diagnosis was that the hot spring had been naturally depleted. ”

"Hot springs will run out naturally?" Mitsuhiko asked curiously. "I remember that hot springs are just ordinary water flowing into the ground and then heating by underground magma. How can it be depleted? ”

"If geothermal energy to heat hot springs is a finite resource, it's possible," Chiba replied when she saw that Sayuki Kubo was a little caught off guard by the question. "For example, the movement of the earth's crust causes magma to cool or something. However, if it is said that it will no longer gush, there are two possibilities: one is that the access to the hot spring itself is blocked or directed to other directions due to geographical changes; The second is that because of the problem of the treatment method of the hot spring water, the local groundwater loss cannot be replenished, and eventually it is completely depleted. ”

"When the hot springs suddenly stopped, the purpose of the inns in the hot spring resorts disappeared," Sayuki Kubo said sadly. "One hotel after another has closed, and until now, we are the only ones who are still doing their jobs. But even we are going to close our doors this year. After all, there are no hot springs, and no guests will come. ”

"Sudden outage?" After Qian Yu heard this word, he was a little surprised. "You mean, the hot springs themselves stopped gushing without any signs of depletion?"

"That's right."

"How could it be..." Qian Yu muttered incredulously. "How is this possible???"

"Is there anything wrong with the 'sudden interruption'?" After glancing at Qianyu's expression, Gray Yuan Ai immediately asked.

"Generally speaking, the depletion of hot spring flow is usually due to the movement of the earth's crust or the depletion of water. Both of these will have a clear precursor ... Chiba explained. The former is precursed by earthquakes and the like, while the depletion of hot springs caused by the latter is definitely gradual. Both of these will have very obvious precursors. ”

"Then there is another possibility," Conan listened to Chiba's narration, his eyes shining with a strange light. "A very small change in the earth's crust has caused the hot springs to go out, but the chances of that are quite small...

"Anyway, I seem to have a bit of an impression here in Heiyuan Village... Qian Yu suddenly seemed to have grasped something, and after thinking for a long time, he said slowly. "Here in Kurobuchi Village, it seems that it is one of the gold mountains that Takeda Shingen focused on mining back then?"

"Yes, there is the best mountain of gold at the time," Conan nodded. "At the same time, it is also the location of Shingen Takeda's secret hot springs."

"And not only that... And the origin of the name Kurobyss Village," Qian Yu pursed his lips. "It is said that the name Kurobuchi Village was named because the soldiers of Takeda Shingen suddenly executed the miners of Kanayama en masse, and the blood stained the creek under Kanayama and even the banks of the river and even the bottom of the river black.

"Why are they doing this?" Ayumi said indignantly. "It's too much!"

"Oda's troops came over, and the Takeda family couldn't stand it, so they were forced to destroy Kanayama." Conan replied.

"Then why not destroy it along with the hot springs?" Mitsuhiko asked. "Hot springs should be something that can be blocked, right?"

"It can't be blocked, after all, the flow of the hot spring should not be too small, and there was no cement used to block the small spring in that era." Qian Yu shook his head and said. "If you really want to harm Oda's army, there is a better way to deal with it, which is to wash the miners' corpses, cut them into pieces, tie them up with iron or gold nuggets, and throw them into the springs. Ensure that when Oda Nobunaga's wounded soldiers come to heal, soak one by one and die. ”

"It's so ruthless... Gray Yuan sighed with emotion.

"What does that mean?" This time, it wasn't Mitsuhiko who asked the question, but Conan, who was a little surprised. "I remember that corpses really can't be soaked in water, otherwise it will pollute the water, but why is that?"

"Clostridium botulinum, the clostridium botulinum produced in an anaerobic environment in a corpse, prevents the cholinergic nerve endings of the person bathing in the hot spring from releasing acetylcholine, and thus cannot carry out nerve signaling. This can lead to neurological damage and eventual death from severe symptoms such as difficulty breathing. ”

"You know a lot!" Tadao who was just watching everyone quietly on the side exclaimed. "That's a lot of esoteric knowledge!"

"Besides, Qianyu, your thoughts are really... Mitsuhiko was visibly frightened. "That's amazing...

"Would you like to go to the hot springs?" Sayuki Kubo thought for a moment and asked. "Maybe you'll find something more?"

"It's too dark, let's go again tomorrow." Chiba glanced at the sky, which was already a little dark. "Or if you have a powerful flashlight here, when I didn't say it."

"It's really not safe to go now," Dr. Asa dissuaded. "It might be a good idea to go back tomorrow morning."

"Okay!" Sayuki Kubo nodded and said with a smile. "Then let's check it out tomorrow!"

At this moment ...

"Hey! Anyone? A loud greeting came from the entrance.

"Huh?" Everyone was stunned - at this time, will anyone still come?

"Tadao," Sayuki Kubo instructed Tadao. "Call Liangzao over and help everyone clean up the finished rice bowls. (Remember?) Everyone is eating, and in between conversations, everyone is eating and talking. I went to receive guests. ”

"Where's the boss?" The voice came again.

"It's coming, it's coming!" With that, Sayuki Kubo ran over. "Hello, I'm the hostess here! Do you have any needs? ”

Qian Yu thought for a moment, folded his hands, and quickly completed the after-dinner etiquette (Go-chiso-samadeshita, which was meant to thank the broadband people for providing such food), and then quietly touched the other side of the hall to peek at the movement of the doorway.

At the entrance, two sturdy men in full adventure costumes, one tall and one short, were looking at the hotel lobby with backpacks and nylon fishing rod bags.

"Come to an upper room, we want to stay for a few days," the tall man said, taking out his wallet. "How much?"

Before Sayuki Kubo could answer, the tall man had already placed a wad of Yukichi Fukuzawa (10,000 yen bills) on the front desk. "No need to look for it, this money should be enough for our room bill for the next few days."

"Interesting... Chiba raised an eyebrow.

"Ahh Thank you for your enjoyment... Sayuki Kubo was so excited that she was even a little incoherent. Immediately prepare the best view for you... Of course... Because the hot springs have dried up, the scenery here is not much better... ”