【Are you sure that’s what you want?】Understanding Health, Food Safety, and Environmental Issues Through Eggs

An original column that takes a deeper look at the everyday eggs we eat, shifting the perspective just a little

I also write articles in Japanese.
If you find my English difficult to read, an AI-translated version of the Japanese article is available via the link above.

Why is it that there are so many varieties of eggs out there, but why are there only a handful of really safe and delicious eggs?

I always have mixed feelings when I look at supermarkets, online stores, etc.

They have a large sales floor and a large number of products, but…
There are very few eggs that I am willing to buy.

I think people tend to focus on price because it is something they eat every day. But because we eat them every day, I think that this may be a problem.
Therefore, I would like to write about my own thoughts on eggs.

You may not agree with all of my views, but I would like to share them with you.
I hope you will take the time to read it when you can.

Eggs With No Information About Their Farming Method

Eggs for which there is no information on the egg product package about the breeding method are normal eggs.

These eggs are typically produced under the following conditions.

• Windowless henhouses

• Cage keeping that is too small and difficult to move freely

• An environment that is poorly ventilated and prone to disease without medication

They are unable to sunbathe, bathe in sand, forage for food, mate, lay eggs, or move to their sleeping areas.

This lack of exercise makes it difficult for them to build up their physical strength and resistance to disease, and stress builds up.
Hens are unable to perform their normal activities, and they continue to lay eggs in a confined space.

Although this has the advantage of less influence from the external environment and more efficient production, it is far from a natural environment.

Even if the price is low, I am not inclined to buy these eggs when I think about the hens that produced them.

Importance of Place of Origin

Even if there is an image of “eggs produced in an area rich in nature," if no further information about how the hens were raised is provided, it simply means that there is a poultry farm in the location indicated.

It does not mean that the eggs are actually laid by pasture-raised hens on the land.

On the other hand, when it comes to free-range or pasture-raised hens, the quality of the surrounding environment is important.

It is worth checking the place of origin carefully. The air should be clean, the environment should be comfortable for the hens, and there should be few predators or other threats.

Don’t be fooled by the appearance or their specific nutritional fortification.

Appearance

• Differences in color, such as white-pink-red

• Differences in yolk color intensity

• The degree of rise of the yolk

• Difference in viscosity or elasticity

• Difference in hardness of shell

• Difference in shape

• Difference in size

etc.
There are many different types of eggs, but I personally think that you don’t need to worry about them that much unless you want them to look good or need to calculate detailed quantities, etc.

Nutritional enhancement

• Folic acid supplementation

• Vitamin A supplement

• Vitamin E supplement

• Vitamin D supplement

• Alpha-linolenic acid supplement

• Contains taurine

• Contains lutein

• Contains Astaxanthin

• Lowers neutral fat

• Low cholesterol

etc.
Hens that lay nutritionally enhanced eggs are often fed special diets designed to increase specific nutrients in their eggs.
To me, this feels a little less natural than allowing hens to eat a more typical diet.

As a product, it does seem appealing…

I think it is more important that the parent hens are healthy and laying eggs in an environment that is close to nature first, rather than feeding them special diets simply to increase certain nutritional values.

And, as in any situation, food is a balance.

It is healthier and less stressful for the body to eat a balanced diet of natural, seasonal foods than to eat several different types of foods that are fortified with nutrients.

Food is very complex, with several nutrients intertwined into one.

It is easy to talk about how certain nutrients are good for the body, but if you focus only on those nutrients, it can be counterproductive to the body. By taking them together with other nutrients in good balance, the absorption rate can be increased, the disadvantages can be offset, and synergistic effects can be expected.

Nutritional foods are designed for people who are deficient in certain nutrients, but I do not believe that the problem can be easily solved by eating them. I think it is safer to think of it as a food to be eaten only when it is difficult to solve the problem.

In my opinion, simply increasing specific nutrients is not particularly important by itself.

More Than Half of Branded Eggs Rely on Marketing

To distinguish their products from others, each producer does everything possible.

• Taste differentiation

• Nutritional differentiation

• Differentiation of origin

• Feed differentiation

• Freshness

• Differentiation by appearance

• Size differentiation

• Differentiation by eco-friendliness

etc.
Differentiation through nutritional enhancement, which I wrote about earlier, is also a brand strategy in a sense. Products tend to be differentiated from items that can be made inexpensively.

Producers create their own image and brand even small differences with packaging and advertisements that catch the consumer’s eye.

However, the more advertising is done, the more expensive the advertising costs become, so less is spent on the actual product.

Since heavily advertised products are often judged by their image rather than their actual quality, we, the consumers, need to check the details carefully before buying them, rather than simply choosing them because they are well known.

Feed safety can easily be unclear.

Corn, soybean meal, rice, acetic acid, wormwood, seaweed, chlorella, oyster shells, bamboo powder, mulberry leaves, paprika, oak and other sap (wood vinegar), ore, marigold, oligosaccharides, lactic acid bacteria, natural water, etc.

Even a cursory search shows that there are so many different types.

However, In most cases, even the type of feed is mentioned, but the extent to which the feed is safe and environmentally friendly is not clearly stated.

• Is it grown with pesticides?

• Is it genetically modified?

• Is it produced in an area with low levels of environmental pollution?

• Is it grown on land with minimal soil contamination?

• Does it contain substances that promote deforestation?

And so on.
I believe that what is really important is not the content but the safety and environmental friendliness.

What chickens eat will eventually become soil and return to nature.

If the feed is not produced in an environmentally friendly manner, the process of producing the feed will be harmful to the environment, and it will also be harmful to our bodies when we eat the chicken meat and eggs.

In addition, a large amount of chicken manure from poultry farms is processed and sold as fertilizer.
That fertilizer is then used to grow vegetables, and the cycle continues.

Not only chicken meat and eggs, but many other things are happening at the same time before food is produced, and the accumulation of these things has an impact on the environment as well.

At the very least, choose cage-free eggs.

Many people may not be able to afford organic eggs that are concerned with feed due to their high price, but it is easy to buy ordinary cage-free eggs because there is a wide variety available these days.

In the past, only cage eggs were available, but the Japanese egg market is definitely changing.

↓I will try to summarize some of them below.

Please use these examples as a reference, as the products available in each country will be different.
My hope is that no matter what country you live in, you will be able to eat eggs that are environmentally and physically friendly and delicious.

Please note that I have excluded eggs that are overly enriched with nutrients or have yolks that differ significantly in color from natural ones.

↑ Currently, the package is red in color.
The description was also changed.

Amatake　Nanbudori Eggs

【Place of Origin】 Iwate Prefecture

【Breeding Method】

• Windowless chicken coop

• Nipple water supply system

• No antibiotics or synthetic antibacterial agents used during the entire rearing period

• Temperature and humidity are carefully controlled using floor-heating and other management systems.

• Poultry litter boiler to reuse energy for heating, etc.

【Feed】
Original feed containing shiitake mushrooms, rice malt, bacillus natto, herb extracts, lactic acid bacteria, yeast, polyphenols, oligosaccharides, Japanese and Chinese herbs and leaves including astaxanthin and carotene, and ancient marine minerals produced from geological strata several hundred years ago

【Amatake website】

Sakuragawa City, Ibaraki Prefecture　Hiragai Eggs

【Place of origin】

Agri-Techno Sakuragawa Farm (Ibaraki Prefecture)

【Breeding Method】

• Windowless chicken coops that allow light and air to enter from the outside

• Multi-level cage-free housing (aviary system)

【Feed】
Corn and soybean meal as main ingredients are non-genetically modified (NON-GMO).

【Product page】Coop Deli e Friends

（I happened to be at the LIFE supermarket and was surprised to see eggs added to the Life Natural product line.

The eggs were cage-free, and the main feed ingredients were non-GMO. They seemed to be simple eggs with no special nutritional supplementation, so I decided to give them a try.

It is not as good as organic eggs, but if it tastes good, it will become a regular product.）

LIFE NATURAL　Yasashii Hiragai Eggs

【Place of origin】
Agri-Techno Sakuragawa Farm (Ibaraki Prefecture)
　
【Breeding Method】

• Windowless chicken coops that allow light and air to enter from the outside

• Multi-level cage-free housing (aviary system)

【Feed】
Corn and soybean meal as main ingredients are non-genetically modified (NON-GMO).

【Product page】
　https://www.jz-tamago.co.jp/life/hiragai/

Apart from the package design and product page, these appear to be the same eggs as the Hiragai Eggs sold through Coop Deli.

↓ There are other cage-free eggs available, so I'd like to introduce a few of them.

Hiragai Sesame Eggs

【Place of origin】

Mt. Bear Co., Ltd. (Okayama Prefecture)

【Breeding Method】【Feed】【Product page】

The website is currently unavailable, so verification is not possible at this time.

Hiragai Ippin

【Place of origin】

Sorting and Packaging: Tamago & Farmers Co., Ltd.– Ishioka Packing Plant

【Breeding Method】

Multi-level cage-free housing (aviary system)

【Feed】【Product page】

Unknown

Top Value's Hiragai Eggs

【Place of origin】

Hokuryo Co., Ltd. (Miyagi Prefecture)

【Breeding Method】

Multi-level cage-free housing (aviary system)

【Feed】

Unknown

【Product page】
Top Value offers three cage-free egg products, and this is the entry-level option. For more details, please see the website below. ↓

PHF Hiragai Eggs

【Place of origin】
Arumu Co., Ltd. (Okayama Prefecture)

【Breeding Method】
Open-air chicken houses with natural lighting

【Feed】
No post-harvest pesticides are used on the corn.
Corn and soybean meal are sourced through a segregated production and distribution system to prevent contamination with genetically modified organisms (GMOs).

【Product page】

That's all for cage-free eggs.
Nowadays, there are also products that focus on factors such as antibiotic use and feed safety. When purchasing, please be sure to check the packaging or website.

↓ I also looked into organic eggs, which have even more stringent standards.

Safe eggs with very low environmental impact

Kurofuji Farm Real Organic Eggs (Organic JAS Certified)

【Place of origin】
Kai City, Yamanashi Prefecture, 1100m above sea level, very cool and comfortable environment even in summer.

【Breeding Method】
Pasture-raised.
Strict standards are applied to the hens' feed, water, and living environment.

【Feed】
The main ingredients of the feed, corn and soybean meal, do not contain genetically modified seeds.

The main ingredients of fermented feed are okara (bean curd) and rice bran. Other ingredients include natural spring water, seaweed powder, aosa seaweed, fish meal, oyster shells, bamboo powder, garlic, and oligosaccharides.

【Product page】Kurofuji Farm website

Coop Deli special page

Recently, it has become easier to purchase organic eggs on the Internet.

The following is an example.
(I will keep updating this page as I find better ones.)

■ 10a Inc

■ Kajiwara Farm Inc

■ Farm Agricola

Farm Agricola's organic eggs are also available for purchase at Green Beads below.
https://greenbeans.com/products/14549414668688/details

The market and environment will certainly change depending on which eggs you choose.

What kind of eggs do you usually buy?

Cage-free eggs, which were not available before, are steadily increasing in number of products to meet the needs of consumers.

I believe that the day will come when eggs, which are expensive and difficult to buy now, will become easier to buy thanks to advances in feed production technology and poultry management systems.

I know there are pros and cons to the current situation and problems we have now.
I hope this article gives you something to think about. If it helps you see eggs from a different perspective, I would be very happy.

Can you always make the perfect boiled egg?

↓ If you'd like to learn more about eggs, I hope you'll also enjoy this article.

They're just boiled eggs, yet making the perfect one is surprisingly difficult. Why is something as simple as a boiled egg so difficult to perfect?

About updates

(Any major changes will be posted here.)

2021.9,28
Added images of real organic eggs

2025.11.25
Migrated articles from the Mutenka Club to note and updated everything

2025.12,23
Added Hiragai Ippin

2026.5,1
Added PHF Hiragai Eggs

Last Updated：2026.6,4

I will continue to update the article as needed.

I believe that an article is never truly finished once it is published, so I will continue to update it whenever necessary.

Thank you for your continued support.

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