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Lake Saiko: Discover the Hidden Gem of Mount Fuji’s Five Lakes

Hello! This is Interpreter Takezawa. Today, we’ll continue our study of Mount Fuji, focusing on Lake Saiko, the third of the Fuji Five Lakes we’re exploring in counterclockwise order after Lake Yamanaka and Lake Kawaguchi.

河口湖
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Lake Saiko: The Maiden’s Lake

Lake Saiko, located in Fujikawaguchiko Town, Yamanashi Prefecture, is often called the “Maiden’s Lake” due to its serene atmosphere and untouched natural surroundings.

Lake Saiko Specifications:
– Elevation: 900 meters above sea level
– Surface Area: 2.1 km²
– Circumference: 9.85 km
– Maximum Depth: 71.7 meters

As part of the Mount Fuji World Heritage Site, Lake Saiko was formed by lava flows from the massive Jogan eruption in 864 CE. It’s the fourth largest of the Fuji Five Lakes and the second deepest after Lake Motosu.

Historical Connection
Lake Saiko was once part of a larger lake called “Se no Umi” along with Lakes Shoji and Motosu. It’s believed these lakes are still connected underground.

Modern Usage
Water from Lake Saiko is artificially released into neighboring Lake Kawaguchi, utilizing a 70-meter elevation difference for hydroelectric power generation.

Natural Beauty
Surrounded by the Misaka mountain range, Mount Ashiwada, and the Aokigahara Jukai forest, Lake Saiko is notably quieter and more nature-oriented than other Fuji Five Lakes. It’s set apart from major highways, preserving its natural charm.

Attractions
Lake Saiko’s attractions emphasize its natural beauty:
– Saiko Bat Cave
– Ryugu Cave
– Wild Bird Forest Park
– Aokigahara Jukai Forest
– Iyashi no Sato Nenba (healing village)

Accommodations like guesthouses and campsites blend seamlessly with the lake’s tranquil atmosphere.

Unique Fish Species
Lake Saiko is home to kokanee salmon, introduced in the Taisho era. Interestingly, in 2010, the thought-to-be-extinct kunimasu (a close relative of kokanee) was discovered here. Kunimasu, once endemic to Lake Tazawa in Akita Prefecture, differ from kokanee in their deeper habitat preference, darker coloration, and more pronounced lower jaw.

World Heritage Significance
As part of the Mount Fuji World Heritage Site, Lake Saiko features:
– Aokigahara Jukai: A primeval forest formed by the Jogan eruption
– Bat Cave: A lava tube inhabited by bats
– Ryugu Cave: A site of historical worship, later associated with Fuji-ko pilgrimages

Lake Saiko stands out among the Fuji Five Lakes for its less developed, more natural state. It’s perfect for those seeking tranquility and natural beauty. Personally, it’s my favorite of the Fuji Five Lakes!

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静岡県裾野市在住。 富士山に暮らす富士山ガイド 富士山エコネット認定 エコツアーガイド 日本山岳ガイド協会認定 登山ガイドステージⅡ