I discovered these beautiful flowers on a hillside facing south right next to the way from Kawauchi campus to Aobayama. They look like Lilies to me, but I’m no flower expert. 😉 If you know the correct name, please let me know in the comments!
Edit: Someone at church recognized the flower as a 山百合 (yamayuri), which literally means “mountain lily”. According to Wikipedia this is the largest kind of lily.