March 28th.

It was a day of spring, and the deus ex machina was in the kingdom of Cerroa.

The location was above the wilds of Bororon. In other words, aboard .

His passenger was the Minister of Agriculture and Forestry, Bowanni San Zecan.

Yes, they are starting a survey ahead of the decontamination of the contaminated area.

"From the sky, you can see the situation of the land very clearly," said Agriculture and Forestry Minister Bowanni San Zekan.

Agriculture and Forestry Minister Bowanni St. Zekan said, impressed.

"First of all, we have to take into account the topography, and it would be best to start with a broad and shallow survey.

"Right."

Although we cannot survey the soil from the air, we can observe the surface ...... topography, flora (flora), fauna (fauna), etc.

This allows us to select candidate sites for experimental decontamination.

"I guess it's not as contaminated as I thought, some areas have quite a bit of grass growing on them."

"That's right. Yes, there may be a degree of contamination. It is not possible for the entire area to be contaminated at the same level.

I guess so.

"For now, let's gather data on the surface first.

In addition, they also select a candidate site for a soil survey by the members of the who are scheduled to visit on the 29th.

* * * *

Meanwhile, Jin had come to the .

Meanwhile, Jin came to the to consult with Lorona, an agricultural expert.

"Well, then, we were discussing the other day about cleaning up the barbaric acts of our people!

Rolona looked angry and then apologetic as he explained.

Jin hurried to calm Rorona down.

"No, no, the <> was caused by the <>, not by your compatriot Rorona. Rather, both of them are victims."

"But I still feel guilty, since we were the ones who started the fight first. I will cooperate with ...... as a top priority.

Thank you.

So, do you know what the contaminants are?

We're still working on the details, but cadmium and hexavalent chromium are the two most likely contaminants.

"Well!"

Both are substances that have become a problem in modern Japan as .

Cadmium is a by-product of smelting zinc and lead, and symptoms of acute poisoning include nausea, vomiting, abdominal pain, and diarrhea. Symptoms of acute poisoning include nausea, vomiting, abdominal pain, and diarrhea, while chronic poisoning results in kidney damage.

The Itai-itai disease that occurred in the Jinzu River in Toyama Prefecture is said to have been caused mainly by long-term ingestion of cadmium.

Hexavalent chromium is a general term for chromium compounds with an oxidation number of +6.

However, chromium is also one of the essential elements that make up the human body, and the human body contains about 2 milligrams of chromium.

Chromium is added as an ingredient in supplements in the form of trivalent chromium.

Hexavalent chromium, on the other hand, is highly toxic and is known to cause redness, rash, and inflammation of the hands, feet, and face.

It is also said to cause inflammation of the mucous membranes of the nose and throat.

As an agricultural expert, Lorona knew a lot about the trace elements that accumulate in agricultural products, and he even found plants that adsorb some toxic substances and improved their varieties.

"I have bred a plant called wassa-aoi, which absorbs cadmium," he said.

"That's great!"

Jin thought to himself, "I knew it was a good thing that I had consulted Lorona.

"There is also a kind of bean called , which accumulates heavy metals in its roots, but has almost no effect on the bean.

"That's good, too."

But the beans are small, and even though they are edible, they are not tasty, so they are mainly used for processing or for animal feed.

"That's fine."

If we can decontaminate the soil little by little just by planting them, it would be very meaningful.

It would be easier to plant such plants than to just leave them there.

"But that's about all I can suggest right now: ......"

"No, that's more than enough."

Jin was planning to call in five golem maids, one for each of the number two golem maids of the five colors, as caretakers for Rorona, who would also be coming to the Kingdom of Selroa on the following day, the 29th. I was going to call in five golem maids to take care of them.

"I'll look forward to working with you tomorrow, then, won't I?

"Yes, Mr. Jin, you can count on me."

Then an unusual visitor arrives.

Jin-sama, hello.

Hello, Rorona.

Hello.

It was Marikka and Delfina.

It's rare to see Marikka out and about. Jin guessed that this meant that it was a very important matter.

"Jin-sama, Delphina-san has a favor to ask you."

"Oh, I see."

Delphina has been living with Marikka for the past few days and has been briefed on the current situation.

What happened during the <> and what the <> = <> did afterwards.

And the way to the present day.

They say they want to know these things and see with their own eyes what their countrymen did in the past. If you can, let me help you in any way.

"Jin-san, I'm here, and Jin-san's golem maids are here, so please take them with you.

"Okay, if you say so, Rorona-san."

"Okay, if Ms. Rorona says so." "Thank you very much."

That's what happened.

* * * * * *

Also in .

Arnold, a native of the former Dinar Kingdom who is now in the body of an automata, was preparing for his visit to the Kingdom of Celluloid.

Accompanying him are three members of the <>, abbreviated as .

Kiku Masukawa, deputy director of the laboratory, Laktart, who is familiar with the actual work, and Yoh Nouki, who is in charge of analysis.

Kiku and Yoh are from Mitsuho, and Laktart is from the Kingdom of Egelea.

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

"It's nice to meet you, too."

Five ...... cheru will accompany us (to avoid complications, we will count automata as one person for this purpose) ...... tomorrow morning, Jin will come to pick me up and we will go together.

It is inevitable that there are more things related to soil analysis equipment than personal belongings.

"Hmmm ...... this ...... could be made a little smaller ......."

"Oh, Mr. Arnold, are you sure?"

"Yes.

Yes.　We'll pay for it!

"Okay. I'll do what I can in the time I have before I leave.

"Thank you very much!

It looks like we are all set and ready to go. .......