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Let's go see the mysterious emerald green crater lake.

Let's go see the mysterious emerald green crater lake.

What is Zao Okama?

Zao Okama is a crater lake located on the border between Miyagi and Yamagata Prefectures in the Zao mountain range, known for its mystical emerald green glow.

With a diameter of about 325 meters and a depth of approximately 27 meters, the lake is also called "Goshikinuma" because its color changes depending on the weather and light conditions.

Zao Okama is situated at an altitude of over 1,600 meters, offering a 360-degree panoramic view, making it one of Miyagi Prefecture's top scenic spots visited by many tourists.

Particularly during the lush green of summer, the autumn foliage, and the snowy landscapes of winter, the area offers beautiful scenery throughout the seasons, making it worth visiting all year round.

Additionally, the area around Okama is serviced by the Zao Echo Line, a driving course that provides excellent accessibility.

This article will introduce you to the allure of Zao Okama, how to enjoy it, and access information in detail!


Highlights of Zao Okama

1. Mystical Crater Lake Shining in Emerald Green

The main attraction of Zao Okama is its emerald green surface.

Due to the high acidity of the crater lake, no fish or other organisms live there, which gives the lake its high transparency and mystical atmosphere.

Moreover, the lake's color subtly changes between blue, green, emerald green, and turquoise blue depending on sunlight and weather, which adds to its charm.

On sunny days, it shines in a more vibrant green, offering a picturesque view perfect for photography.

2. Observation Spots for a Panoramic View of Okama

There are several observation spots around Okama, each offering views of the crater lake from different angles.

Recommended Observation Spots

  • Kattadake Summit Observatory
  • → A popular spot for the most beautiful view of Okama. The view from the 1,758-meter summit is breathtaking!
  • Zao Highline Endpoint (Katta Pass)
  • → The closest observation point accessible by car. It has a parking lot, making it easy to visit.

3. Enjoying Seasonal Scenery

Zao Okama offers different expressions each season, making it worth visiting year-round.

Spring (May to June): Snowmelt and Fresh Greenery

Due to the high altitude, snow often remains even in spring, allowing you to enjoy the contrast of the snowy world and the emerald green lake.

Summer (July to August): Many Clear Days, Best Season!

The air is clear, and the lake's emerald green appears most vivid during this season.

It's also recommended to enjoy a hike while feeling the cool breeze of the highlands.

Autumn (September to October): Spectacular Spot for Autumn Foliage

The mountains of the Zao range turn into a spectacular season of red and yellow.

The view of the autumn leaves around Okama and the distant mountains turning colors is breathtaking!

Winter (November to April): Frost-covered Trees and Snowy Scenery

Although roads are closed during winter, making direct access impossible, you can see frost-covered trees while ascending via the Zao Ropeway.

It's also recommended to visit while skiing or snowboarding.


How to Enjoy Zao Okama

1. Driving the Zao Echo Line

The most common way to reach Zao Okama is via the **"Zao Echo Line"** from the Miyagi side.

This road is open from spring to autumn and is famous as a scenic drive course that reaches an altitude of 1,600 meters.

Along the way, there are observation spots and waterfalls, making the journey enjoyable as well.

2. Enjoying Zao Hiking

A hiking course is also available around Okama, allowing you to enjoy the crater lake while walking through nature.

Recommended Courses

  • Kattadake Hiking Course (about 30 minutes)
  • → A beginner-friendly route offering spectacular views in a relatively short time.
  • Kumanodake Trekking (about 2 hours)
  • → A slightly more challenging course aiming for the 1,841-meter summit of Kumanodake.


Useful Information for Travelers

Access Information

Access by Train and Bus

  • About 40 minutes from Sendai Station to Shiroishi Station via the JR Tohoku Main Line
  • About 90 minutes by bus from Shiroishi Station via the Zao Echo Line to Katta Pass Parking (operates only in summer)

Access by Car

  • About 1 hour and 30 minutes by car from Sendai City
  • About 60 minutes by car from the "Shiroishi IC" on the Tohoku Expressway
  • Parking: Paid (around 500 yen)

Admission Fee and Hours

  • Admission Fee: Free
  • Zao Highline Toll (final section): Regular car 550 yen
  • Open Period: Late April to early November (closed in winter)

Wi-Fi Information

  • No free Wi-Fi around Okama (it is recommended to prepare a downloaded map in advance)

Language Support

  • Tourist brochures in English and Chinese available (at the Miyagi Prefecture Tourist Information Center)
  • Zao Ropeway staff can provide basic English assistance




Summary and Frequently Asked Questions

Zao Okama is a representative tourist spot of Miyagi Prefecture where you can enjoy the mystical emerald-green crater lake and the magnificent mountains.

On clear days, you can enjoy a spectacular view, and it's recommended to visit in combination with a drive or a hike!

Frequently Asked Questions

Q: Can you see Okama in winter?

A: The Zao Echo Line is closed in winter, so direct access is not possible, but you can enjoy the snowy scenery from the Zao Ropeway.

Q: Is it worth visiting even in bad weather?

A: As Okama is at a high altitude, the weather can change quickly.

On cloudy or rainy days, the lake surface may not be visible, so it's recommended to check the weather in advance.

Be sure to enjoy the grand scenery of Zao Okama!



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