On January 29th, the day after celebrating Martha's birthday, Jin, Elsa, and Reiko returned to Miyako without any problems.

Yesterday, they were supposed to have stayed in the guest house, reading books in the library.

In fact, the two doppelgangers had finished reading most of the books in the library, which could be said to be huge.

Naturally, the contents of those books are stored in the old man's memory device.

"Master Jin, Master Erza, Master Reinhard, how are you today?

Mii, the hostess, asked me after breakfast.

"Well, they are working on the canal right now, aren't they?　I would like to see it.

Jin himself has little knowledge of civil engineering. What they are doing on Horai Island is heavy work. Therefore, he wanted to take this opportunity to absorb as much knowledge as possible.

"Okay. I will make arrangements.

Mii nodded and left the room, but returned a little later.

The site supervisor was just in the town hall, so I told him about it. He said he would be honored if the <<<< Magecraft Meister would take a look at it.

"Yes, yes."

As usual, Jin, who is not used to being lifted up, felt a little uncomfortable, but he did not show any such signs to Mii, who had arranged the event for him.

"So, would you like to come now?"

"Yes, that would be great."

Since they had no particular plans, Jin and the others decided to go and see the exhibition immediately.

"...... This is a different kind of ride."

One by one, Reinhardt got on the rickshaw and gave an honest impression.

"Why not have a golem tow it instead?"

Jin, in the car next to us, responded to this muttering.

"No, in that case the car would have to be stronger or it would be dangerous.

"Yeah, ...... that's true."

With this comment, Reinhardt recognized the danger.

The speed of the car is only human now, but if a golem were to pull it, it could easily reach 50 km/h. At that speed, it would be like a rickshaw.

At that speed, if the slender rickshaw-like body were to overturn....

"Or we could make it a golem that can't go that fast."

If it's dangerous, we could put a limiter on it.

"I see. It has power and endurance. There might be a demand for them.

While exchanging such conversation, we arrived at the outskirts of town.

This was the place where they were starting to build a waterway through the town of Miyako.

"Wow, that's great!"

Reinhardt exclaimed in admiration.

No wonder, the construction work is being done entirely by hand.

"Welcome diplomat and Magecraft Meister!

A man who looked like a foreman greeted them.

"Mr. D'Souza, I'm looking forward to working with you.

Mii greeted him. The foreman's name seems to be D'Souza.

"Let me briefly explain that we are going to dig a canal first, and after the canal is completed, the water will be poured into it.

"I see."

The two most important things to take care of are to prevent the channel from collapsing and to prevent water leakage.

"Certainly, if that is not ensured, it cannot be operated as a waterway, can it?

D'Souza smiled as Jin answered,

D'Souza smiled and said, "There is one more item that is quite difficult. Can you guess?

He said, "Can you guess?

The way he said it was a bit challenging, so Jin thought about it seriously.

"Well, it's important for the construction of the canal, isn't it?

Jin recalled the time when the hot spring was constructed in the village of Kaina.

The construction itself was done by engineering magic, but the precautions should be the same.

He thinks of ...... and thinks of one thing.

"The slope of the channel, right?"

If we don't consider the slope of the channel, the water will not flow into it, or it will flow backward, or it will stagnate, and it won't work as a channel.

"Good answer. As expected of the Magecraft Meister."

D'Souza also seemed a little surprised at Jin's answer.

* * * *

The group moved a little closer to Lake Sayama and came to the very spot where they were digging.

"There are many layers of stones in this area, so we are having a hard time digging."

D'Souza explained as he showed them the construction work.

Indeed, there were many stones, some of them larger than a watermelon.

"The stones we dig out are processed and used to reinforce the walls and bottoms of the canals."

"So they don't waste it."

The reason is that it is inefficient to transport heavy stones so far for disposal. That is reasonable.

However, the stones are processed by hand using a tool.

This may sound like the Edo period, but this is the Mitsuho way.

Jin wonders if golems will eventually perform this kind of work as exchanges with the Kogun countries progress ......, he thought absentmindedly as he listened to the sound of the taganets chiseling the stones.

At that moment.

"Supervisor!

came a loud voice from the site.

What's wrong?

A huge stone came out!

"No, it's a rock!"

Jin and the others joined in and looked at the site.

There was a huge rock blocking the waterway.

"It looks like a ...... chart."

It is the same hard rock used in the research laboratory on Horai Island.

"This is a hard rock.

Duesa, the site supervisor, also looked reluctant.

At that time, Mii asked Jin a question.

"Jin-sama, what do you do in the East in a situation like this?

"There are several ways. They all involve magic.

Such as?

"We could use engineering magic to break it up, or have a golem dig it up. ......"

I can break it up.

Reiko interjected from the side. Jin chuckled.

"That's true, but it's not that common.

D'Souza heard this and turned to Jin.

"Jin-sama, is that true?"

"What?"

"It's true that you can break that rock.

"That's easy."

Reiko answered on Jin's behalf.

"Shall we ...... do it?"

"By all means!"

"Yes, I'll do it. Father, may I?

"Yes, it's what you asked me to do. But not too much.

Yes, sir.

Reiko jumped down onto the construction site.

"Everyone, please step aside, it's dangerous."

What?

You are the servant of the Magecraft Meister. I look forward to working with you!

One of the ingenious people in the room knew Reiko, and all of them hurried to get out of the way.

"Well then..."

Reiko fired a light blow.