Genmaicha, which translates to "brown rice tea", is a tea of Japanese origin that combines green tea with roasted brown rice. Due to the rice popping from the roasting process, it is also sometimes known as "popcorn tea". Genmaicha was first created when rice was used as a filler to reduce the price of tea, and was originally consumed by the poor. It has also been known to be drunk for fasting purposes.
Due to the addition of rice, genmaicha has a stronger, nutty aroma compared to most teas. It's also noted for a shorter brewing time.