[Mount Chokai-Tobishima Geopark: Yurihonjo Edition] See the geological layers from when Japan was part of the Eurasian continent

, dividing the Dewa region from north to southMount Chokai (2,236m)is a municipality that occupies about 70% of the Yuri region, which is spread at the foot ofthe Koyoshigawa River, a first-class river.

During the Edo period,Honjo, Kameda, and Yashima—held powerthree small domains—, Honjo Prefecture, Kameda Prefecture, and Yashima Prefecturewere established, but they were soon incorporated into Akita Prefecture.

Mount Chokai, towering south of Yurihonjo City, is a rare free-standing peak that rises from 0m above sea level over the Sea of ​​Japan. Since ancient times, it has been revered as a mountain that breathes fire, and today it is loved by people as a mountain where traces of volcanic activity and precious natural beauty remain


Chokai-Tobishima Geopark is made up of four areas. The Yurihonjo area is themed around the mysteries of the Earth

The Chokaisan-Tobishima Geopark,the Yurihonjo areacentered around Mount Chokaithe Sakata area (Sakata City/Yamagata Prefecture)as, the Yuza area (Yuza Town/Yamagata Prefecture), and Tobishima (Sakata City)to the southThe Nikaho area (Nikaho City/Akita Prefecture)each displays its own unique character. In the Yurihonjo area, which stretches across the northeast, you can experience the mysteries of the Earth, such as the exposure of geological strata from long before Mount Chokai was formed, when the Japanese archipelago was still part of the Eurasian continent.


Ishizawa Falls: Flowing through layers of rock from the time when the Japanese archipelago was part of the Eurasian continent

Ishizawa Falls
The 30 million year old andesite cliffs of Byobuiwa Rock loom over the rocks. Behind them is Ishizawa Falls. © Mt. Chokai-Tobishima Geopark

"Ishizawa Great Waterfall"in the central part of Yurihonjo City, wherethe Sasamori Hillsgeological strata dating back about 30 million years are exposed for approximately 8 kmthe Ishizawa Valleyis located in

30 million years ago, Japan was still attached to the eastern edge of the Eurasian continent, and of course there was no Sea of ​​Japan. The Japanese archipelago separated from the continent about 20 million years ago, so this stratum is 10 million years older than that

At that time, the Earth was erupting from all over, and the geological formations of Ishizawa Gorgeandesite, whichis lava that flowed out from surrounding eruptions and cooled and solidified. The gorge is lined with cliffs made of andesite, and"Ishizawa Great Waterfall"and"Byobu Rockthere are viewpoints such asByobu RockNearcolumnar jointing. The gorge is closed to traffic during the winter (December to late April), so it is not possible to visit during that time.

Ishizawa Falls and Byobuiwa Rocks <Information>

  • Location: Nishinokado, Oyanagi, Yurihonjo City, Akita Prefecture
  • Phone number: 0184-24-6376 (Tourism Promotion Division, Tourism, Culture and Sports Department, Yurihonjo City)
  • access:
    • Train: Approximately 40 minutes by car from JR Ou Main Line Ugo-Honjo Station (Road closed from December to late April)
    • By car: Approximately 25 minutes from Honjo IC on the Nihonkai Tohoku Expressway, or approximately 40 minutes by car from JR Ugo-Honjo Station (Road closed from December to late April)
  • Toilet: Yes
  • Shops and rest areas: None

Google Map


Akata Falls, where two streams join and fall from above the fault

Akata Falls
Akata Falls, which flows over a fault. © Mt. Chokai-Tobishima Geopark

Akata Great Fallsis a 23-meter-high waterfall located in the northern part of Yurihonjo City. The upper part of the waterfall is bifurcated, withthe larger stream called "Otoko-taki"andthe other stream called "Me-taki" (female waterfall). The geology of this area is complex and intricate, and the white rocks at the top are rhyolite formed approximately 2,300 to 5 million years ago, when this area was at the bottom of the sea, from lava of an underwater volcano that cooled and solidified. The waterfall is said to have formed on a fault running north to south.

Akada Great Waterfall<Information>

  • Address: Akada, Yurihonjo City, Akita Prefecture
  • Phone number: 0184-24-6376 (Tourism Promotion Division, Tourism, Culture and Sports Department)
  • access:
  • Train: Approximately 40 minutes by car from Ugo-Honjo Station on the JR Ou Main Line
  • By car: Approximately 25 minutes from Honjo IC on the Nihonkai Tohoku Expressway
  • Toilet: Yes
  • Shops and rest areas: None
  • Parking: Available

Google Map


Approximately 9 meters tall. One of Japan's three major Hase Kannon temples, the "Akata Great Buddha"

The Great Buddha of Akata
Approximately 9m tall. The golden shining "Akata Buddha" ©Akita Prefecture

The "Great Buddha of Akada", a temple that was the center of Akada, which hasChokokujistanding approximately 9 meters tall (approximately 7.878 meters excluding the pedestal) and enshrined in the Great Buddha Hall ofChokokuji Temple in Nara Prefecture (Sakurai City, Nara Prefecture)andChokokuji Temple in Kamakura (Kamakura City, Kanagawa Prefecture)Along withone of the three great Hase Kannon of Japanit is counted as"the Great Buddha of Akada."is known as

Hase-dera Temple is said to have been founded in 1775 by Zen Master Zesan of the Soto sect, and served as a place of prayer for the Kameda Domain, which ruled this area during the Edo period. The principalimage, a standing statue of the Eleven-Headed Kannon Bodhisattva, was destroyed along with the Great Buddha Hall in a great fire in 1888 (Meiji 21). The current Kannon statue was restored in 1892 through a donation from a benefactor, and the Great Buddha Hall was also rebuilt in 1893 (Meiji 26). Hase-dera Temple is the 8th temple on the Akita Prefecture Thirty-Three Kannon Pilgrimage, and the Eleven-Headed Kannon Bodhisattva statue is a designated cultural property of Yurihonjo City.

Hasedera Temple
Hasedera Temple, a place of prayer for the Kameda clan ©Akita Prefecture

The Great Buddha of Akada<Information>

  • Facility name: Shohozan Hasedera Temple
  • Address: 115 Akada Ueda Omote, Yurihonjo City, Akita Prefecture
  • Phone number: 0184-22-1349 (Shohozan Hasedera Temple)
  • Free to visit
  • access:
    • Train: From JR Ou Main Line Ugo Honjo Station, transfer to Honjo Office and take the bus bound for Akada Daibutsu for approximately 30 minutes, or take a taxi from JR Ou Main Line Ugo Iwatani Station for approximately 7 minutes
    • By car: Approximately 17 minutes from Honjo IC on the Nihonkai Tohoku Expressway

Google Map


Shinzan Park is a hill formed by the uplift of new andesite rocks 8 million years ago

Niyama Park
Yurihonjo cityscape with a view of Niyama Park (hills in the foreground) and Mt. Chokai © Mt. Chokai-Tobishima Geopark

Shinzan Parkisat the mouth of the Koyoshi River. The geological strata in this area were formed about 8 million years ago when it was still the bottom of a shallow sea, and volcanic ash and lapilli erupted by an underwater volcano accumulated and were exposed when the area was uplifted over 100,000 years ago. The rock layer of volcanic ash and other rocks is about 200m thick and"new andesite."is called

Shinzan Park is home tothe Shinzan Shrine, and every January, the"Naked Pilgrimage,", is held there. Shinzan Park is located at an altitude of approximately 100 to 140 meters, and in spring, it is a popular park where visitors can enjoy cherry blossoms for an extended period, from Somei Yoshino cherry trees in the 100-meter area to mountain cherry trees in the 140-meter area.

Niiyama Park<Information>

  • Location: Ishiwaki Kamichoronuma, Yurihonjo City, Akita Prefecture
  • Phone number: 0184-24-6376 (Tourism Promotion Division, Tourism, Culture and Sports Department, Yurihonjo City)
  • URL:Niiyama Park
  • access:
    • Train: Approximately 10 minutes by car from Ugo-Honjo Station on the JR Ou Main Line
    • By car: Approximately 15 minutes from Honjo IC on the Nihonkai Tohoku Expressway
  • Toilets: Available (closed in winter)
  • Shops and rest areas: None
  • Parking: 15 standard-sized cars

Google Map


"Hottai Falls" selected as one of the "Top 100 Waterfalls in Japan"

Houtai Falls
"Hottai Falls" falls over a single lava rock. ©Tabi Tohoku

Hottai Falls, the source of the Koyoshi River, on the slopes of Mount Chokaithe Tamada Valleyis a waterfall located in"Japan's Top 100 Waterfalls."and is a famous waterfall selected as one of

It is said that Houtai Falls was formed when a single sheet of lava flowed out during the eruption of Mt. Chokai about 100,000 years ago and dammed up a river. The lava that created the waterfall is called "Houtai Lava," and you can walk on it. It has been designated as a Place of Scenic Beauty and a Natural Monument by Akita Prefecture

Hōtai Falls<Information>

  • Location: Hyakutaku, Chokai-cho, Yurihonjo City, Akita Prefecture
  • Phone number: 0184-57-2205 (Yurihonjo City Tourism Association Chokai Branch)
  • access:
    • Train: Approximately 50 minutes by car from Yajima Station on the Yuri Kogen Railway
    • By car: Approximately 70 minutes from Honjo IC on the Nihonkai Tohoku Expressway
  • Toilet: Yes
  • Parking: Available

Google Map


Kuwanokidai Marsh, where the lily flowers that gave rise to the name "Yuri" bloom

Kuwanokidai Marsh
Kuwanokidai Marsh, where rhododendrons, day lilies, and cotton grasses bloom in early summer © Mt. Chokai-Tobishima Geopark

Kuwanokidai Marshlandis located at an altitude of approximately 700m on Mount Chokai and was formed by the accumulation of rock avalanches that occurred in ancient, prehistoric times. Covering an area of ​​8 hectares (about the size of two Tokyo Domes), the marshland has well-maintained boardwalks, allowing visitors to enjoy trekking while taking in views of Mount Chokai.

The wetlands areskunk cabbage and cotton grass, offering beautiful sights throughout the seasons. In early summer in particular, youwhite cotton grass,"lily")the Nikko daylily (said to be the origin of the nameand rhododendrons, creating a stunning contrast of white and orange across the wetlands.

Kuwanokidai Marshland<Information>

  • Location: Arazawa, Yajima-cho, Yurihonjo City, Akita Prefecture
  • Phone number: 0184-24-6376 (Tourism Promotion Division, Tourism, Culture and Sports Department, Yurihonjo City)
  • access:
    • Train: Approximately 40 minutes by car from Yajima Station on the Yuri Kogen Railway
    • By car: Approximately 60 minutes from Honjo IC on the Nihonkai Tohoku Expressway
  • Toilets: Available (closed in winter)
  • Parking: 15 standard-sized cars

Google Map


Super soft water. The famous "Botsumeki Spring Water" is used for the local tap water and craft beer

Botsumeki Spring
Super soft water. Botsumeki Spring Water produces 900 tons per day. © Mt. Chokai-Tobishima Geopark

Botsumeki Spring water, which rises to an elevation of 713m, on the opposite bank of the Koyoshi River that flows at the foot of Mt. ChokaiYashioits smooth taste, it is used not only as local tap water but also in local craft beer."Botsumeki"toof the Ainu word for "foaming"is a variation"botsumegu,"out, but the exact origin is unknown. The area around the spring is a park, and many people visit to collect water.

Botsumeki Spring Water<Information>

  • Location: Higashiyuri Kurobuchi, Yurihonjo City, Akita Prefecture
  • Phone number: 0184-24-6376 (Tourism Promotion Division, Tourism, Culture and Sports Department, Yurihonjo City)
  • access:
    • Train: Approximately 35 minutes by car from Yajima Station on the Yuri Kogen Railway
    • By car: Approximately 60 minutes from Honjo IC on the Nihonkai Tohoku Expressway
  • Toilet: Yes
  • Parking: Available
  • Other: Closed during winter

Google Map


Katakinuma Marsh
30m above sea level. A rare lowland wetland, "Kadakinuma Wetland" © Mt. Chokai-Tobishima Geopark

The Yurihonjo area of ​​the Chokaisan-Tobishima Geopark, including the Kameda Fudo Falls with a drop of approximately 25 meters and a width of approximately 10 metersChokailocated at a low elevation of 30 metersKatakinuma Marshboasts numerous geosites where you can enjoy the natural beauty ofthe Yurihara Plateau (Higashi-Yurihara)its oil and natural gas fields. Why not visit Yurihonjo City to experience the "present" state of the Earth, which has been changing over many years?

Chokaisan-Tobishima Geopark<Information>


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