1. The an that is considered as one of the oldest and most highly refined among the arts of Japan

Art is termed as the wide range of human activities that involve innovation, imagination, and technical proficiency. It also involves beauty and conceptual ideas. There is exactly no idea about the meaning of art but it keeps on changing constantly and keeps implying innovation in it.  

The answer is Painting.  

In the country of Japan, the art of painting is one of the oldest and richest traditions. It is the most highly regarded out of all the art techniques. The Japanese paintings can be expressed in many genres and aesthetics. It also has a wide array of styles.

It started to develop in the prehistoric period and was developed during the whole of Japanese history. During this time, there were influences of China, as well as European countries on the art. It remained very different from all the other styles of art and was highly valued in Japan as well as globally.

To know more about the arts of Japan, refer to the link below:

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Painting

Explanation:

In Japan, the art of painting is one of the oldest, with the richest tradition, and most highly regarded out of all art techniques. Japanese paintings have a wide array of styles in which they can be expressed that vary in genre and aesthetics.

It started to develop in the prehistoric period, and it was developed during the whole of Japanese history. During this time, there were influences of China, as well as European countries, on the art. It remained very distinctive from all the other styles of art, and highly valued in Japan as well as globally.