
Yahweh is the only God common to Judaism, Christianity, and Islam.
In the passage of the lyrics of Japanese Ise folk songs,
Korah korah yaha toko oseenuo
(Call, call, call Yahweh. Yahweh will crush your hatred.)
It was introduced in a Japanese TV program that the Hebrew words have the meaning.
If you are interested in such the relationship between Japan and Yahweh, you can read more about it in "Japanese-Jewish common ancestry theory".
What is "The Theory of Japanese-Yew Ancestry"? Summary of similarities between the history of Israel and Japan
Please read this article.
Anyway, who is Yahweh?
Origin of Yahweh
The faith before the establishment of Judaism is called the Yahweh (Elohim) faith.
And each has its own differences as a god,
- Elohim: abstract God
- Yahweh: concrete personal God
That is all for the summary.
Yahweh was an emotional God who expressed not only mercy but also anger and envy.
Gradually, Yahweh took on the character of the One Absolute God.
Neither Yahweh nor Elohim was the same faith.
But in the part of being the one and only God

Oh, which was which?
Before long, they became confused and came to be regarded as the same God.
Etymology of Yahweh
The name Yahweh has long been interpreted in connection with a root meaning "being".
In the Old Testament book of Exodus,

I am what I am.
This is what Yahweh said when he responded to Moses.
The Hebrews also said in their oaths

The Lord lives.
They used such the the cliché.
What we can learn from these words is that

Yahweh is not clear, but it is vivid and real.
To learn more about the story of Moses in the book of Exodus,
What is "Exodus"? A brief synopsis of Moses!
Please read this article.
Incidentally, regarding the beginning of the book of Genesis in the Old Testament, Jews, Christians, and Muslims have all been saying that

The true identity of the cosmic space is Yahweh (God).
Can't we just say the name?
When Yahweh's name appears,

Adonai ("My Lord")
The Jews began to read Yahweh's name so.
Even today, the name remains the same.
The reason for the change of the name is stated in the Ten Commandments of Moses found in the Book of Exodus and other books as follows.
Thou shalt not utter the name of the LORD thy God without a just cause. The LORD will not leave unpunished those who say the name of the LORD your God in vain" (Exodus 20:1).
(Exodus 20:7)
This is how it is written in the book of Exodus.
Regarding this content,

It is thought that this may be due to the later interpretation that directly mentioning the name of God is an awe-inspiring taboo.
It is believed that this is the reason that it is forbidden to speak God's name directly.
We do not know when Yahweh stopped being mentioned.
It seems to have appeared frequently in the letters up to around the Babylonian Captivity.
However, in the "Septuagint," the oldest Old Testament that began to be translated around the beginning of the 3rd century B.C.,
Curios (= Lord)
Yahweh were replaced from it in most places.
Yahweh in Judaism
Yahweh in the Old Testament was the only God and the creator of the whole world.
He was also a kind of supreme principle of the universe.
Character of Yahweh
Although generally ambiguous, Yahweh himself is actually considered sociable.

I am jealous.
Yahweh, the Creator God, calls Himself so.
In other words, he loved mankind so much as his own creation.

All right, let's make mankind like Me.
In "Genesis" he even created mankind's inner self in the image of Yahweh.
If you want to know the story of "Genesis" including how Yahweh, God, created human beings,
What is Genesis? A summary of the book's synopsis and characters!
Please read this article.
Yahweh and the Prophets
In "Genesis" and "Exodus," there were scenes in which the prophets were put to the test.
The meaning of this is to have the following things be understood through the prophet.

Mm, he is a very real being.
Yahweh in Christianity
In the Book of Exodus,

I am what I am.
Yahweh identified himself as such.
This led Jesus to use that phrase a lot to show that he was closely related to the god Yahweh.
God as found in the Christian Bible is
- Father (Yahweh)
- The Son (Christ)
- Holy Spirit
The concept of the Trinity implies the above.
What kind of God is Yahweh?
The religious reformer Jean Calvin, in his book The God of the Bible satates that

The one and only eternal God, the source of all good things. Therefore, all praise should also be rightly attributed to God.
Yahweh and Christ
Such the Yahweh appears in the Old Testament but not in the New Testament.
Even where Jesus Christ supposedly quoted from the Old Testament, Yahweh did not appear.
However, God was expressed in it like this.

Heavenly Father
This is due to the effect of pronunciation prohibition.
However, in the New Testament book of Revelation, chapter 19

Hallelujah
The abbreviation of Yahweh comes out in the form of it.
Don't say Yahweh
As recently as 2008, at the Vatican
The name of God, which is written in the four sacred letters (it is Yahweh), must not be used or pronounced in the liturgical setting.
Pope provided that guideline.
He concerned about the widespread practice of pronouncing God as a proper name.
So Yahweh had to be translated as "Lord," and he asked that the name of God be deleted.
Yahweh in Islam
In Islam, Yahweh is called below:
Allahu Akbar (or Allah)
The Prophet Muhammad (pbuh) was a messenger who spoke in Arabic at the request of God Allahu akbar from the archangel Gabriel, who was sent by God.
He would be the last prophet.
Muhammad is only a chosen one from among mankind.
In Islam,

A being who neither gives birth nor is born.
Because this is Allah, Muhammad is not considered the Son of God, the Father.
The prohibition of idolatry
God is transcendent in all things.
He exists everywhere and at all times because He has no eyes, ears, or mouth, but only the will to speak.
He cannot be represented in paintings or statues, which is why Islam completely rejects idolatry.
On the God of Creation
It can be said that Islamic teachings are meant to make Judaism and Christianity certain.
So, the God of these three religions is considered to be the same Yahweh.
Therefore, the following things are agreed upon by each religion.
- Allahu Akbar created the heavens and the earth in six days
- Eschatology, in which all mankind, including the dead, will be resurrected on the Last Day and the Last Judgment will take place
However, with regard to the seventh day of rest,

Almighty God would not have rested on the seventh day.
Islam thinks like that, so they deny that he rested on the seventh day.
Differences in Islam
These little differences in religious beliefs can be,

Well, other religions can be artificially altered.
Muslims see it that way.
However, as for the Qur'an, which is the Bible for Muslims

The Qur'an is a complete reproduction of the words that were conveyed to Muhammad directly from the archangel Gabriel, whom God had sent.
They believe so.