Cool micromoss growing on soil.
may be コスギゴケ.
I like this stuff, it's easy to ID. Growing on a seepy trail with lots of sporophytes. Always a tall healthy looking moss. 40 lamellae 2-5 cells high that end before the bistrtsoe margin.
I thought this was a Polytrichum and went straight for the polytrichum key but it just did not quite fit. The lamellae are only 2 cells high and the plant was growing on rotting wood.
I little more research I and knew I had pogonatum contortum based on the 2 cell lammelea and the way the leaves are crisped when they are dry.