Lost bag

Hi, on the 20th march 2017, I wanted to went home from Tokyo station to Narita international airport. So I took the Narita express to got there. When I got home I realized my bag was left in the Narita express train and I was in the green car I thought that I left the bag behind the chair, have you seen it?
The brand of the bag is kippling, length is about 40 cm and the tall is about 30 cm. The color of the bag is dark brown, I could bring it with my hand or I can use it as a shoulder bag. Inside it there's a Tokyo banana and other else