The last eruption was over 20,000 years ago. So, it is not active volcano. Mt. Akagi has several moutains, Mt. Kurobi (1828m), Mt. Komagadake (1685m), Mt. Jizodake (1674m), Mt. Choushichiro (1579m) and Mt. Nabemawari (1332), and 2 lakes, Lake Onuma and Lake Kakumanbuchi.
There is many travel spots in Mt. Akagi. Sky is one of the major attraction in Mt. Akagi. Many Japanese famous sky players are trained in Mt. Akagi. You can have great view of the top of the mountain.
In the October, you can enjoy great autumn tint in this mountain.
There are many hot spring "Onsen" in Mt. Akagi.