"However, if you really want to talk about it, Brother Tadao is here to find treasure, right?" Just as Sayuki was about to take the detective group back to his room, Conan looked at Tadao's somewhat reddened face and said lightly.

"Huh?" Tadao was stunned.

"You said you were a treasure hunter, didn't you?" Conan shrugged.

"Ahh Tadao smiled bitterly. "That's true, that's right..."

"Could it be that there is a treasure here!?" Mitsuhiko said excitedly.

"Treasure?" The tall man had just taken off his shoes with his partner and walked into the hall, but at this time he looked at Tadao curiously. "Friend, would you mind telling me about it?"

"Ahh Tadao looked at the tall man's eyes and blinked. "Okay... Then let's find a place to sit and talk, and go to my room. ”

"Go to our room." The tall man said. "That's what I paid for the lectures."

"Ahh Sayuki suddenly remembered something. "Two guests, you haven't registered your names yet!"

"Oh... The tall man scratched his head. "That... My name is Ichiro Kimura. Then he pointed to the short man. That fat man is called Jiro Tanaka. ”

"Where am I fat!" Jiro Tanaka said speechlessly.

“。。。” Chiba observed Tanaka Jiro's figure - although he was not thin, he was not very fat after wearing a jacket, and judging from the neck he pulled down after entering the room and exposed his jacket, he should be a muscular man.

"Since you work here, you should be familiar with the rooms here, right?" Kimura Ichiro glanced at Tadao . "Take us there."

。。。

"Hmm..." Sitting in Kimura and Tanaka's room, Tadao glanced at the little ones next to him. "Since there are little ones in the audience, don't you mind if I start with the basics?"

"Anyway, it's still a long time before nightfall," Tanaka was about to say something, but Kimura took the lead. "It's better for you to popularize it to them so that they don't interject into the core content and ask questions that aren't nutritious."

"We know a lot about treasures, too!" Yuan Tai said unhappily. "It's a hidden treasure!"

"Why should the treasure be hidden?" Tadao asked with a smile.

"Huh? This... After Yuan Tai muttered a word, he instantly became dumb.

Tadao looked at the others, and neither Ayumi nor Mitsuhiko knew the answer; Gray Yuan mourned as if he had heard nothing, and looked ahead; After a glance at each other, Chiba and Conan shrugged their shoulders and said that they didn't know the answer - the question was too big to answer.

"Treasures are treasures that ancient people hid in hidden places," Conan began to explain. "Because Japan did not have such institutions as banks during the Warring States period, and there were no channels to store large sums of money - in the Far East next door, around 713 AD, that is, at the beginning of the Kaiyuan Dynasty of Tang Xuanzong, there were already cabinets that could store large sums of money by paying rent - so it was safest to bury the treasure in a place that only you knew. Because no matter how well guarded, it can be breached, but treasures whose location no one knows can be preserved. However, the treasure collector is likely to die suddenly due to a violent illness or accident, and he will not have time to explain the location of the treasure. In this way, the treasure becomes a treasure that no one knows where. ”

"That's right," Tadao smiled softly. "So it's our job to find out these treasures~"

"Why does it sound like gold in a haystack... Mitsuhiko tilted his head, confused. "Japan is so big, it must be difficult to find treasures!"

"Don't underestimate the quantity and quality of Japan's treasures!" Tadao retorted with a smile. "Do you know how Marco Polo's travelogue describes Japan?"

"Cipangu, the land of gold."

“cipangu？ Is this the Italian meaning of the Golden Country? Ayumi said curiously.

"There shouldn't be that word in Italian," Gray Plains, who had been silent, shook his head. "Arabic doesn't have the P sound, and I don't know Chinese and Mongolian. Other languages should not be in Marco Polo's language library. ”

"cipangu is the meaning of 'Japan' in Chinese (the pronunciation of Japan in Middle Chinese)... Conan pursed his lips, then turned back to Tadao. "It's true that his Japan is extremely rich, but it's doubtful that he actually came here!"

"yes... Qian Yu nodded. "Although there are accurate accounts of some events, as Haiger and Krunas (skeptics of Marco Polo's travels) said, Marco Polo's travelogues have many flaws, and many scholars in the Far East have investigated and shown that there are no traces of Marco Polo in historical sources."

"But there is no doubt about it," Tadao said in surprise as he looked at Conan, Chiha, and Ashbara. "Many of Japan's warlords did have superhuman wealth lost underground, such as the treasure of the Yuki family, which the Edo shogunate coveted and desperately searched for, and which was buried by the Yuuki Haruhuni Dynasty in the northern Kanto region; Imperial gold buried in the Akagi Mountains and the Tokugawa shogunate in Gunma Prefecture; There is also Toyotomi Hideyoshi's military gold buried in the Tada Silver Mountain in Hyogo Prefecture. ”

"Are you looking for the treasure of the Takeda family?" Conan raised an eyebrow. "But if I'm not mistaken, there have been super-large-scale excavations in the history of several gold mountains here... There was even a grand scene of thousands of people digging gold, but nothing was found. ”

"But if they didn't find the treasure because there was no treasure here, then it's hard to explain the more than a dozen gold bars in the last years of the Meiji era," said Chiha. "That's not a small amount."

"Do you have so much knowledge?" Tadao exclaimed. "I even know that."

"What the hell are you talking about?" Motota poked Conan and asked.

"At the end of the Meiji era, the body of a man who had fallen to his death was found at the foot of nearby Kurokawa Kanayama," Conan explains. "He has more than a dozen gold bars on his body, so it has triggered a treasure hunt."

"More than a dozen? How much is that? Mitsuhiko asked.

"At the end of the Meiji era, the world currency was the pound sterling, but the United Kingdom adopted the gold standard, and one pound was equivalent to 7.32 grams of gold, and if there were more than 10 pounds, it might be about 600 pounds."

"£600?" The little ones were obviously disappointed with this answer. "That's less than 100,000 yen, right?"

"£600 was expensive at that time... Qian Yu pursed his lips. "In 1918, the average weekly wage in Britain was 1.5 pounds under the condition of working 52 hours, and it would only be lower at the end of the Meiji era, so 600 pounds can be said to be the income of the average British person for ten years."

"So much!" The little ones marveled together.

"I think that the treasure of Jin Takeda Shingen is not actually on the well-known Kurokawa Gold Mountain, but in the Gold Mountain Mine here!"