This trail begins about halfway up the Minoo Waterfall
trail, near the end of the Meiji era buildings. It is very useful for making a lollipop loop. Cross the creek over a nice bridge. The trail initially is fairly wide and flat as it follows the river through mossy forest. Eventually the trail pulls away from the river and heads up a tributary (semi-seasonal).
You'll pass through some cool narrow rocks and then up some small well made switchbacks - look for "Lion Rock" at the top - it actually looks like a male lion with ivy for the mane. After this the trail feels like it stays high above the Minoo stream and offers a few fleeting views back down the valley towards Osaka. There is also a small shelter you could rest at. The trail returns to the Minoo Waterfall
which you should finish taking to the falls.