Cruise to the island where you can do a short walk around it. Aboard the cruise ship, look out for deers grazing along the wateredge. They are held out of the main tourist area with fences but they will come all the way up to the fence for food.
There is a museum on local culture and wildlfe, some derelict Shinto shrines and great forests around it. There isn't much to occupy yourself with so most people hop onto the next cruise ship to return to the main jetty.
Written Sep 7, 2010
The night views around the onsen hotels are really pretty. You can snoop around the hotel grounds that are open to the public that are decorated with lights, the main street where lanterns are strung or walk around the rim as fireworks are released over the lakes (nightly between mid June to September)
Some hotels deliberately turn off the lights when the fireworks are being released so that guests can view the works from the dark comfort of their rooms
Updated Sep 7, 2010
There are 2 main types of cruises. In the day, the cruise ship goes to two different islands where you can stop to explore the islands and pop back to the main onsen hotel area. At night, there are fireworks viewing cruises. The ship goes out to the middle of the lake where there is total darkness.
Motorboats that speed around the lake release the fireworks over the lake.
Written Sep 7, 2010
Showa Shinzan is one of Japan's youngest mountains. Accompanied by earthquakes, the mountain suddenly rose from a flat wheat field to its current height of 290 meters between 1943 and 1945. According to the contemporary reign of Emperor Showa (1926-1989), the mountain was named "Showa New Mountain".
Still venting sulfurous fumes today, Showa Shinzan stands directly next to Mount Usu, which bears responsibility for the new mountain's birth. You can get good views of the young volcano by taking the Usuzan Ropeway.
Written Feb 9, 2007
This is a brown bears farm in the area near Showa-shinzan mountains
Written Feb 9, 2007
clear view of a lively volcano that can anytime erupt.
Written Aug 1, 2006
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Reviews and photos of Toya-ko attractions posted by real travelers and locals. The best tips for Toya-ko sightseeing.

clear view of a lively volcano that can anytime erupt.
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1

Toyako Onsen is a touristy hot spring resort along the shore of Lake Toya, just at the foot of Mount Usu (Usuzan). Several large luxury hotels stand right alongside the lake, offering rooms and...
2
Touristy Onsen Town or Serene Relaxation Spot

The Toya Lake Region make up one of the National Park sights in the Central region of Hokkaido (the other being Shikotsu-ko). Being a popular onsen town, where many large onsen hotels are gathered...
3

Lake Toya is an ancient caldera. There are two active volcanoes nearby. Today, it is a resort area filled with many hot spring spas dotting around the lake.
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