Peeping sheet is an informal term for the action by which individuals travel to photograph and see the fall leaves in New England where colours in autumn shifts, especially in places in the Usa. The source of the term leaf peeping isn’t well known. An identical custom in Japan is called momijigari.
Leef peeping in Japan
Momijigari, from the Japanese momiji, reddish leaves or maple tree and kari, hunting, is the Japanese custom of going to visit picturesque places where leaves have turned red in the fall. It’s called Koyo. Kouo is another pronunciation of the characters for momiji which suggests autumn colours or leaves changing colours. Additionally it is called kanpukai in Hokkaido.
Which means getting together to view the leaves. With the cities of Kyoto and Nikko being especially well-known destinations many Japanese people take part in this. The custom can be said to have originated as a pursuit that was cultured in the Heian age, and is the reason many deciduous trees can be discovered in the Kyoto region. There exists also a custom of going to see places where colour is changed by grasses, like on Kami kouchi and the Oze plain.