Strange Chest in Japanese Park

This is a weird little chest sitting in a park in Japan next to the path. I wondered what was inside, so I went to take a look, but I guess that's exactly what they knew would happen. This is actually a great way to get the attention of people just walking past. Honestly, it's genius, I didn't expect this to be an ad at all. This was recorded on my trip to Japan in October 2019.