Wrong turn - probably giving up

About 90 minutes into our hike, we started to think that we had gone the wrong way. The path, which had been well groomed and dotted with benches and signs (in Japanese) got very rough. And, we haven't seen any other hikers. We went down the rough path for a while, but have now turned back. We're going to explore one more route, but we may just turn and go all the way back as we have now wasted 2 hours on what looks like the wrong trail. With that much time gone, we don't have a chance to restart.