Nanakusa-gayu is a rice porridge with seven kinds of wild herb in early spring, which is eaten on the morning of January 7th. It has been said that by eating this porridge, people can not only fend off evil spirits but also avoid various kinds of diseases for the year.
The seven nanakusa herbs of spring are seri, nazuna, gogyo, hakobera, hotokenoza, suzuna, and suzushiro

For more information and recipes, please see: Nanakusa Gayu (Seven Herb Rice Porridge) 七草粥 • Just One Cookbook