Thank you for viewing. Black Friday is over, so I'd like to try an auction. How about taking this opportunity? Generally, soft and semi-hard sanshin cases can be carried on your back, but hard cases don't have that feature. So, I made one. It can be used on your back or over your shoulder. It's a convenient item for those who use public transportation such as trains and buses. When not in use, it can be stored inside the hard case. Since the sizes vary slightly depending on the manufacturer, it's adjustable. Also, the shoulder strap can be removed and used as a sanshin strap. I will also include the string for that purpose. One can be changed to blue (see photo 11). I walked with it on my back for two days during a trip the other day, and there were no problems, so I think it's durable. The stitches are hand-sewn by an amateur, so please understand that the stitches may be crooked. Please note that the hard case and sanshin are not included. The size of the hard case used for the photo is approximately 230X105X830. For reference.