葵祭[aoimatsuri] hollyhock festival
慰霊祭[ireisai] memorial service
学園祭[gakuensai] school festival
学祭[gakusai] school festival
冠婚葬祭[kankonsousai] important ceremonial occasions in family relationships

祇園祭[gionmatsuri] Gion Festival (in Kyoto during the month of July, with high point on the 17th)
供祭[gusai] offerings
血祭り[chimatsuri] bloodbath
元始祭[genshisai] Festival of Origins (January 3)
五十年祭[gojuunensai] jubilee