It's made of iron posts and covered with a net. You might think it's a cage in a zoo to display insects or birds, but no, there are people inside. On weekends there are lots of people - so many that others are willing to wait two to three hours to get in. They come here to improve their golf. This is a driving range, designed to use very little space in crowded Japan.
Players keep hitting balls from the tee stations to the far side of the cage.
Nets surround the cage, so even if the golfers hit really hard or make wild shots, the balls stay inside the driving range. Every day, golfers come here to improve their game and practice long shots. Price can vary depending on the time of day, and the day of the week. At many driving ranges, the tee stations are on two, even three tiers. You have to pay extra to practice at ground level, because it seems more like the real thing.