Chochin, Japanese paper lanterns are particularly associated with matsuri, like this first photo at a summer matsuri in Shima, Mie.
These were on the beach at one of my favorite local matsuri, at Kuromatsu near Gotsu.
They are also found in shrines, like these at the shrine across the river in Kawado.
On the street for the Gonokawa matsuri in Gotsu.
Some of the big and famous shrines have impressive lantern displays like here at Yasaka Shrine in Gion, Kyoto.