The day I visited was cloudy which created a magical view as we the fifth station is above the clouds. There is plenty of great souvenier shops and foods to buy here too.
At Subaru Line Fifth Station the sun was shining and the mood was rather upbeat. There were restaurants, souvenir shops, and shops selling clothing and climbing gear; just as well as I had forgotten to bring any warm clothing, so a nice fleece with the image of Mount Fuji was purchased for ¥6000. I enjoyed a nice Japanese meal at one of the small restaurants before the climb. At the Fifth Station there were also coin lockers, which were ideal so I didn't have to carry anything that wasn't essential to the climb.