This is a great day trip that you can take by train. All you need is a good camera, good footware (no heels or flip-flops / thongs), some money (of course), and some mates. You'll be 1,212m above sea level, so expect it to be a little cool and breezy.
In JapaneseYunoyama: 湯の山 Gozaisho dake: 御在所岳 Yunoyama-Onsen: 湯の山温泉
What you can see and do thereThe autumn leaves there are spectacular. Before this, I never understood the Japanese love of autumn leaves, and especially thought it odd that men got excited about these. For me, it was a good Japanese experience, and a great photographic one, too.
In the off season, it'll be great mountain hiking, skiing in winter, and just great views of unusual rock formations (see photos below)
How to get thereFrom Nagoya, take the Kintetsu express to Yokkaichi, then change to a branch line to the Yunoyama-Onsen station. There is a bus available from spring to late autumn, but not in winter. If you drive, be warned, that it's really popular and you'll have to wait hours for one of the 300 or so car parking spaces available. So, try to get there before 9am to have a hope. Car parking for us was 800yen for the day.
From the Yunoyama bus stop or car park, it's a 5-10min walk to the cable car (or ropeway / ロープウエイ). Then take the 'ropeway' up to the top of the mountain. The mountain top is called Gozaisho-dake. It cost us 1,890 for a return ticket.
Suggested things to do:1. Take the cable car up, take pictures on the way up, and from up there. Have lunch at the restaurant. Lunch there is mostly ramen
2. Cable car up, then walk / scramble over rocks and around trees for that real mountain hiking adventure. You'll see more fantastic views than just from the top of the mountain.
3. In winter, from the mountain top, take the ski lift (with ski gear or snowboard) to the ski slope and have a ball over there

It's a great place to go with a few friends, and it'll be a great experience that you can write home about, and have some great pictures to brag about, too.
