maple leaf

Image contains maple tree leaves, most likely of the Japanese maple variety (Kaede, "Acer Japonica"). A common feature of pictures set in the Autumn.

Japanese maple leaves have a similar appearance to marijuana leaves.

NOTE: 'Momiji' has a couple of meanings.
One of them means autumn leaves in general. It refers various kind of leaves and trees that turn red or yellow in autumn.
The second one is another expression about maple trees.