Fuyujitaku-sama
This is Kawaguchi Hidetoshi. This is my humble answer to the question.
Thank you very much for always reading hasunoha.
“Are there any unified sutras regardless of denomination?” ... Actually, there are Buddhist scriptures compiled with such a purpose.
About the Buddhist Missionary Association and the “Buddhist Scriptures”
http://www.bdk.or.jp/buddhism/index.html
What is a “Buddhist scripture”...
The important elements and parables of the teachings were selected from “sutras,” which collected true teachings preached by Buddha (Buddha = meaning an awakened person), the founder of Buddhism known as Buddha, and expressed them by replacing them with gentle everyday words.
The “Buddhist scriptures” were created with the idea that “Buddha's open teachings should be understood by everyone in the world in words that are easy to understand.”
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“Buddhist scriptures” are sometimes placed along with the Bible in a mirror drawer, even when staying at a large hotel, and it also seems that they are sold by the Buddhist Missionary Association, so please buy them if you like.
http://www.bdk.or.jp/buddhism/book01.html
Now, the teachings left by the Buddha have been handed down to the present as Buddhist scriptures in various ways. As it is called “The Eighty-Four Thousand Dharma,” Buddhism was explained as being so convenient (explained in an accurate response to each person's suffering and hesitation).
What is most basic in terms of convenience are the “Four Sacred Truths,” the four sacred truths of suffering, gathering, destruction, and abandonment.
As a representative example, we are in the midst of four hardships (birth, old age, death, love separation, grudge, hate, unrequited suffering), but those suffering have causes (causes and conditions) that lead to the consequences of that suffering, and we have suffered, and if we can do something about the causal relationships (causes and conditions) that cause that suffering, we can always eliminate suffering, and the method (Buddhism) for that purpose (Buddhism) makes full use of good, good, and convenient, and Shaku Buddha explained the religion I was impressed.
Therefore, I would be grateful if you could understand a little bit of the content of all sutras as a supplement, assuming that the contents of all sutras are explained as a basic principle.
Kawaguchi Hidetoshi Gassho