Located in the heart of Oze, the wetland is the largest of its kind in Japan. It's also known as Oze-ga-hara and its unique terrain is eye-catching. Oze boasts an area of about 6km east to west and 2km north to south, and the wetland has been formed over a period of more than 6,000 years. It's a popular spot for mountain climbers to enjoy the vast nature. However, it's also known for its unpredictable weather, so it's a good idea to be prepared with clothes that can be changed according to the weather.