I realize it is unlikely that we'll find this, but my son left an envelope on either the 204 or 205 bus from Daitoku-ji to Kyoto station. It was some calligraphy that was written by a monk at Daitoku-ji and my son wanted to carry it, but in some confusion when we exited the bus, it was left behind. Is there any way to check with a lost and found for items like this that have sentimental value, but would not require a police report?