Koyasan locates in Kansai region at 6HHH+32 Koya, Wakayama city. You can take one Day trip from Osaka-Namba to this area.
Take Nankai line from Namba station to Hashimoto Station (NK77) then change train to Gokurakubashi Station (NK86). Next transfer to cable car to Koyasan station (NK87).
If you buy Kansai Thru Pass can be use to this area either train, cable car, and bus are all included. But you have to transfer 3-4 times.
Koyasan was founded by Kobo Daishi (Kukai). Since it was founded as a place for Buddhist training and ascetic practices some 1200 years ago, this sacred site of religious faith has built up its own unique history and culture. Koyasan Registered as a UNESCO World Heritage Site in 2004, and then granted three stars in the Michelin Green Guide Japan in 2009. Source by nankaikoya
Who was Kobo Daishi?
Kobo Daishi, born in Japan in the year 774, was the priest who founded Koyasan, the religious city on the mountaintop. His intelligence was noted from his earliest years, and at age 31 he journeyed to China. On his return he was able to bring new teachings to Japan, and, after using what he had learned in China for social projects, he founded Koyasan in 816 as a place of study for Zen training and to pray for divine protection of the state.
At the mountain of Koyasan have many places that you can walk, do sightseeing, and activity. I show you about places that you might to visit and some photo. When you come and visit this place that you will find places that interesting at the top of the mountain by yourself.