Shinto Ema and Sacred Camphor Tree

In the old times, people used to donate horses to Shinto shrines, as part of their prayers to the gods (kami). In time, the horses were replaced by statues of horses and then by ema 「絵馬」, plaques of wood decorated with horse drawings (絵 means drawing and 馬 is the kanji for horse).

Today, the prayers are written on ema, which are then hung on special places inside the shrine. The ema are usually beautifully decorated with various themes, from the shrine's crest (which are called Kigan-Ema) to zodiacs signs (Eto-Ema) or even... anime.

If during the old days only reach people afforded the horse donations, today an ema can be bought for 1000-1500 yen (12-18 US $) and almost all the shrines have racks with impressive numbers of ema.
This is the main ema rack from Meiji Jingu, beautifully built around one of the sacred camphor trees: