Title Hachimannuma Pond and the Hachimantai Summit

  • Aomori
  • Akita
  • Iwate
Topic(s):
Nature/Ecology Activities National Parks/Quasi-National Parks
Medium/Media of Use:
Interpretive Sign
Text Length:
≤250 Words
FY Prepared:
2019
Associated Tourism Board:
Towada Hachimantai National Park
Associated Address:
Hachimantai-shi , Iwate

八幡沼と八幡平山頂

八幡平高原は海抜1,613メートルにある台地状の山頂で、ここには穏やかな湖沼、広々とした湿源、広大なアオモリトドマツの森林があります。沼の中でも一番大きく、地域の象徴でもあるのが八幡沼です。

約7,300年前に形成されたこの火口湖は周囲約1.5キロメートルです。沼を囲む板敷きの道を通って周囲の湿原を散策できます。夏の半ばから初秋にかけて、湿地はゼンテイカ、チングルマ、ワタスゲなどの高山植物が咲かせる花で明るく色付きます。

近くにある鏡沼は、晩春に起こる自然現象にちなんで八幡平ドラゴンアイというニックネームがつけられています。沼のふちの雪が溶けて沼の輪郭が開くにつれ、残っている氷の中心も溶け始めます。上から見ると、沼は巨大な目のように見えます。沼は美しいですが、雪解けの間は危険なので沼のふちに近づかないで下さい。

見返峠は秋田県と岩手県の県境に位置しています。見返峠からは、東に八幡平およびその湖沼と湿原、南に岩手山、早池峰、秋田駒ヶ岳などの山々のパノラマの景色が一望できます。また、見返峠では、八幡平山頂レストハウスと駐車場が利用できます。


Hachimannuma Pond and the Hachimantai Summit

The Hachimantai highland has a plateau-like summit at 1,613 meters above sea level that is home to tranquil ponds, expansive wetlands, and vast forests of Maries’ fir. The largest of the ponds, and a symbol of the area, is Hachimannuma Pond.

This crater lake, formed approximately 7,300 years ago, has a circumference of roughly 1.5 kilometers. An encircling boardwalk trail provides access to the surrounding wetlands, which are brightened by blooming Amur daylilies, avens, watasuge cottongrass and other alpine plants from midsummer through early fall.

Nearby Kagaminuma Pond is nicknamed “Hachimantai Dragon Eye” because of a natural phenomenon that occurs in late spring. As the edges of the pond thaw, opening a ring of water, the center of the remaining ice also begins to melt. When seen from above, the pond resembles a giant eye. While beautiful, the pond can be dangerous while it thaws, so visitors should keep away from the edge.

Mikaeri Pass is located at the border between Akita and Iwate prefectures. The pass offers panoramic views of Hachimantai and its ponds and wetlands to the east, as well as Mt. Iwate, Mt. Hayachine, Mt. Akita-Komagatake, and other mountains to the south. Visitors can also take advantage of the Hachimantai Mountaintop Rest House and parking at the pass.


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