A cosy jazz cafe

I came across a cosy jazz cafe on my way home. It is located on a hilly place. We could enjoy the beautiful view of the surrounding places from there, a view which extends infinitely into the horizon. During the day time, we could see the whole of Kanto plain, and we were also impressed by the illuminated town below at night, when looked it like a cluster of sparkling jewels.
I was drinking a cup of coffee while listening to the heartwarming voice of a female singer. I felt that I was gradually freed from every stress that I had before.
The manager told me, "There is a special place around here where fireflies fly around during the summer. It is very near here. Unfortunately, it is over this year".
I should/will go there and confirm see for myself this amazing animal wonder of Japanese nature next summer. They would fly around, burning their passion of love during that short period.