Momijigari aka Kanpūkai

Momijigari (紅葉狩^?), from the Japanese momiji (紅葉^?), "red leaves" or "maple tree" and kari (狩り^?), "hunting", is the Japanese tradition of going to visit scenic areas where leaves have turned red in the autumn.

It is also called kanpūkai (観楓会^?).^[1] in Hokkaidō^[2]
 
Many Japanese people take part in this, with the cities of Nikkō and Kyoto being particularly famous destinations.

The tradition is said to have originated in the Heian era as a cultured pursuit, and is the reason why many deciduous trees can be found in the Kyoto area.

There is also a tradition of going to see areas where grasses change colour, such as on the Oze plain.

The Heian period (平安時代 Heian jidai^?) is the last division of classical Japanese history, running from 794 to 1185.^[1] The period is named after the capital city of Heian-kyō, or modern Kyōto. It is the period in Japanese history when Buddhism, Taoism and other Chinese influences were at their height.
Oze Marshland (尾瀬ヶ原 Oze-ga-hara^?) is a high altitude marshland in the Oze National Park, Japan.