陰陽道 - on-yo-do (the principle of yin and yang)

The on-yo-do philosophy named comes from the Chinese principle of yin and yang. People in ancient China discovered five natural elements: wood, fire, earth, metal and water.They thought that these five elements could explain everything concerning the universe and human life. These five elements were also combined with the principle of yin and yang to form philosophy. The words yin and yang mean negative and positive, and they are the opposites of each other. This philosophy was introduced to Japan in the sixth century, and the Japanese people came to know it as on-yo-do. On-yo-do explained natural phenomenon and told people’s fortunes.

古代中国の陰陽五行説に由来する学問。木・火・土・金・水の五つの元素(五行)によって宇宙・人生のすべてを説明する五行説に、陰と陽の相反する考えを結合させたもの。6世紀頃日本に伝えられ、日本ではとして広まった。自然現象を説明し、人間の吉凶を判断する。