This is the grandfather, or more precisely, the maternal grandfather, of Kindaichi.

Regardless of whose bloodline it is, Hajime-chan believes she inherited Kosuke's genes, and whenever she encounters a problem, she always gambles in her grandfather's name first.

Watching him passionately talking to Boss Mao, I wondered if he was going to gamble with Grandpa again.

Yuanshan Yeben instinctively turned to leave.

"Ah, Mr. Toyama!" Mr. Shigeru called out to him from behind, "Have you heard of Gunkanjima Island in Izu?"

Because he usually enjoys chatting about local customs and anecdotes, Boss Mao obviously thought he would be interested, so he wanted to share some of his thoughts.

Yoruichi Toyama had no choice but to turn back, chuckled twice, and indicated that she didn't know.

...I don't know anything! During World War II, Chinese laborers were mining in the mines, living on a blood and sweat island. You Japanese who are living comfortably still have the nerve to mention it?

Just you wait, if you really piss me off, I'll tell you about seeing the giant mushrooms in Nagasaki on that island!

The Japanese people present were completely unaware of Yoruichi Toyama's plans, preoccupied with exchanging the documents they had on hand.

"So you didn't know that a gold mine was ever found on that island?" Boss Mao said, beaming.

Gold mine?

Yoruichi Toyama raised an eyebrow, as if she had remembered something.

Kindaichi's childhood friend, Nanase Miyuki, also happily joined in.

"I heard that there are still 200 kg of gold nuggets left on the island from when they were mined!"

"Wow! 200kg! How much is that worth?" Kindaichi had absolutely no concept of such things. "Would that be enough to buy our family a big villa and not have to pay the mortgage?"

"Based on the current market value," Mr. Mao chuckled, "200kg of gold should be worth around 900 million yen."

"What? 9.9 billion?!"

Kindaichi, the boy, fell into a daze.

Although it's unclear why Kindaichi Kosuke's descendants are doing so poorly, for Hajime-chan, his impoverished family background certainly limited his perspective and imagination.

This allowed him to be successfully swindled again and again in the name of money.

Yoruichi Toyama could see it all; whether it was Miyuki or Mr. Shigeru, they were both desperately trying to fool Kindaichi.

Because Miyuki immediately produced two tickets-like objects, she pretended to be troubled and said, "What should I do? A senior who got into university said she had something come up and transferred these to me. But there are two spots available!"

"W-What quota?" Hajime-chan took the bait like a silly fish.

"It's a spot for an expedition to Gunkanjima!" Miyuki said matter-of-factly, as if she were going to an amusement park.

"Everyone says that the gold on the island hasn't been discovered yet, so the island has been renamed Gold Island. The company that contracts the island's tourism business has set a quota, allowing only 15 people to visit the island each month."

"Wow! That must be a lot of money for the trip. How could your senior, Nanase, be willing to transfer it to you?" Boss Mao chimed in at the right moment.

“It’s not expensive!” Miyuki said, blinking her eyes. “It’s less than 10,000 yen per person, but it’s very difficult to get a spot.”

10,000 yen is approximately 500 RMB in the real world where Yoruichi Toyama lives.

In the world of Kindaichi, which was in the 1990s and early 2000s, when the exchange rate of the Japanese yen to the Chinese yuan was relatively high, it was equivalent to a little over 1,000 yuan.

Considering the 4-day, 3-night Izu trip mentioned in the information, it's really not expensive.

"So cheap?" Boss Mao's surprise was clearly intentional, but at this moment Kindaichi was so shocked by the 900 million yen that he lost his ability to see clearly.

"What happens if a tourist actually finds gold on the island? The tour company will take a cut, right?"

Capitalists are driven by profit; this attention-grabbing scarcity marketing strategy, besides providing the company with a boost in publicity, is naturally aimed at those genuine treasures.

"I heard that the travel company spent a lot of money to buy the independent operating rights of Golden Island in the early stage. The gold found will be split 50/50 with the tourists. This is written in the travel contract."

Miyuki winked at the bewildered Kindaichi: "But even if it's split 50/50, if we actually find the gold, that's a whopping 450 million yen!"

“400 million…50 million…” Kindaichi drooled as if suffering from the aftereffects of a stroke.

"Sigh, it's a pity I still don't know who to ask to go with me..."

"How about Makabe-senpai? He's also in the mystery club, and he's got a good head..."

Faced with Miyuki's clumsy attempts to fish and provoke, Yoruichi Toyama and Boss Shigeru both sighed and covered their faces.

However, at the same moment, with a "bang," Kindaichi slammed his hand on the table and stood up.

"It's decided! Miyuki, I'll go with you!"

"So that my family can move to a bigger villa, so that my mother can have imported tea sets, so that my father can have imported liquor and cars, so that I can have my new game console..."

"I'm betting my grandfather's name! 450 million, here I come! Hahahaha!..."