Nagatoro Iwadatami
The Nagatoro Iwadatami is part of a geological zone called the Sanbagawa belt and is characterized by "gneiss" and "jointing" formed from schist. This geological phenomenon occurred approximately 85 to 66 million years ago, revealing metamorphic rocks shaped by pressure and heat. The Iwadatami is also referred to as the "Window to the Earth," making it a valuable location to observe rock structures deep beneath the surface.
The surrounding area offers seasonal attractions, with activities such as rafting on the Arakawa River and enjoying natural shaved ice being particularly popular. The Arakawa has sections known as "Toro," where the water pools in a striking blue color, which is the origin of the name "Nagatoro." The Iwadatami itself displays a variety of faces throughout the seasons, with Yukiyanagi blooming in spring and Wisteria in summer.
Nagatoro Iwadatami is conveniently accessible, located just a short distance from Nagatoro Station on the Chichibu Line. Visitors can also partake in activities such as canoeing, kayaking, and rafting. Furthermore, the area was designated as a scenic spot and natural monument in 1924, and collecting rocks and plants is prohibited. The designated area extends from Obanohashi Bridge to Takasagobashi Bridge, where many people enjoy the beauty of nature.
Basic Information
- Spot Name
- Nagatoro Iwadatami
- Location
- 〒369-1300 Nagatoro, Chichibu-gun, Saitama Prefecture
- Access
- About a 7-minute walk from Chichibu Railway Chichibu Line "Nagatoro Station."
- Parking
- None
- Business Hours
- Nagatoro Line River Cruise
9:00 AM to around 4:00 PM
*From March 10 to March 17 and from November 24 to December 4, the hours are 10:00 AM to 3:00 PM.
*Hours may be shortened depending on the situation. - Fees
- Nagatoro Line River Cruise Fee
Adults (middle school age and older): 2,000 yen
Children (3 years and older): 1,000 yen - Contact Information
- Phone Number：0494-66-3311
- Official Website
Map
Detailed Information
Nagatoro Iwadatami in Saitama Prefecture is a natural masterpiece created by beautiful valleys and bizarre rock formations. It is said to be the birthplace of Japanese geology, where the unique landscape featuring Iwadatami resembles a painting. Various forms of massive rocks are surrounded by the river, and on the opposite bank stands the towering "Chichibu Red Cliff," with heights of several dozen meters.
The rocks of Iwadatami are made of schist, which was formed deep beneath the ground and pushed up to the surface. The rock spreads approximately 80 meters in width and 600 meters in length, creating a surface pattern that resembles a tatami mat, divided into square sections. This rock was born from global tectonic shifts that occurred deep within the Earth and is often referred to as the "Window of the Earth."
Nagatoro Iwadatami is a location where the beauty of the scenery changes with the seasons: cherry blossoms in spring, river activities in summer, autumn leaves, and snowy landscapes in winter, providing diverse expressions throughout the year. Here, visitors can feel close to nature while enjoying activities such as river rafting and canoe tours.
One of the most popular attractions is the "Nagatoro Line Downstream." This involves boarding a sightseeing boat and flowing down the Arakawa River through the Nagatoro Gorge. There are three different courses, each offering a unique perspective to enjoy the natural beauty. Along the way, you can see the massive Iwadatami, the steep cliffs of Chichibu Red Cliff, and the bowl-shaped potholes formed by nature, showcasing the artistry of natural formations.
In the vicinity, there are plenty of tourist spots such as Nagatoro Onsen and Nagatoro Shrine, where you can also enjoy delicious dishes made with local ingredients. Whether you prefer quiet strolls while feeling the breath of nature or active outdoor experiences, this is truly a perfect spot to immerse yourself in the beautiful nature of Japan.
