Oze Marsh (Ozegahara)

A Nature Lover’s Paradise: Exploring Oze Marsh in Gunma, japan


Japan is known for its breathtaking landscapes and natural wonders, and Oze Marsh in Gunma prefecture is no exception. With its vast highland marsh and diverse vegetation, Oze Marsh is a paradise for nature lovers, hikers, and scientists alike. This article will delve into the wonders of Oze Marsh, providing detailed information on how to get there, the unique flora and fauna found in the area, and the experiences awaiting visitors of all ages.

Oze Marsh: A Jewel in Gunma’s Crown

Located at an altitude of 1,400 meters, Oze Marsh is Japan’s largest highland marsh. It is a part of the Oze National Park, which encompasses not only the marsh but also Ozegahara and Ozenuma Pond. The area was formed by the damming and compaction of lava after the surrounding volcanoes erupted, creating a unique landscape that attracts researchers and nature enthusiasts from all over the world.

How to Get There:

Oze National Park is easily accessible from both Tokyo and Gunma. If you are traveling from Tokyo, the most convenient way is to take the JR Joetsu Shinkansen to Jomo Kogen Station, which takes approximately 75 minutes. From Jomo Kogen Station, you can then take a bus to either Tokura or Oshimizu, which takes around 110-120 minutes. Alternatively, you can take a local train to Takasaki Station and then transfer to the JR Joetsu Line to Numata Station, which takes approximately 2.5 hours. From Numata Station, buses are available to Tokura or Oshimizu, with travel times of around 80-95 minutes. During the peak season from May to October, there are also highway buses (Oze Go) departing from Shinjuku to Tokura and Oshimizu.

Suitable for Different Ages of Hikers:

One of the reasons Oze Marsh is so popular is because it caters to hikers of all ages. The marshland is traversed by wooden planks, which not only provide a guided path but also offer up-close views of the pristine flora. These paths are crucial for the conservation efforts of the marsh, so it is important for visitors to stay on them and avoid veering off. The well-maintained trails make Oze Marsh accessible even for those with limited hiking experience, allowing everyone to enjoy the beauty of this natural wonder.

Mizubasho and Nikko-kisuge: Nature’s Treasures

One of the biggest attractions for hikers and flora enthusiasts in Oze Marsh is the rare mizubasho, also known as skunk cabbage in English. Despite its unattractive name, the mizubasho is a beautiful plant that flourishes in the marshland. Its vibrant green leaves and unique flowers add a touch of color to the otherwise serene landscape. Another highlight is the Nikko-kisuge, or yellow day lily, which blooms in abundance during the summer months. The combination of these unique plants, along with the spiky creeping pines and virgin forests of beech trees, creates a truly enchanting atmosphere in Oze Marsh.

Activities and Experiences:

Aside from hiking and marveling at the natural beauty of Oze Marsh, there are several other activities and experiences to enjoy in the area. Birdwatching is a popular pastime, as the marsh is home to various bird species, including the endangered Japanese crane. Photography enthusiasts will also find endless opportunities to capture stunning landscapes and close-up shots of the unique flora and fauna. Additionally, camping is allowed in designated areas, providing visitors with the chance to immerse themselves fully in the tranquility of Oze Marsh.

Recommended for You:

If you are looking to further explore the natural wonders of Gunma prefecture, there are several other attractions that come highly recommended. Sanjo Falls, located in Fukushima prefecture, is a majestic waterfall surrounded by lush greenery. It is a perfect spot for those seeking a peaceful retreat and a chance to witness the raw power of nature. Another recommendation is Iya Valley Rafting in Tokushima prefecture, where you can have an exhilarating adventure navigating through whitewater rapids. These destinations offer unique experiences that complement the beauty of Oze Marsh.


Oze Marsh is a nature lover’s paradise, offering a unique and diverse ecosystem that captivates the hearts of all who visit. From its vast highland marsh to its rare flora and fauna, Oze Marsh is a testament to the beauty and resilience of nature. Whether you are a seasoned hiker or a curious traveler looking to immerse yourself in Japan’s natural wonders, Oze Marsh is a destination that should not be missed. So, pack your bags, put on your hiking boots, and embark on a journey to discover the enchanting world of Oze Marsh in Gunma, Japan.

Address And Maps Location:

Katashina, Tone-gun, Gunma-ken

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