Lake Towada

Lake Towada (十和田湖, Towada-ko^?) is the largest crater lake in Honshū island, Japan. Located on the border between Aomori and Akita prefectures, it lies 400 meters (1,800 ft) above sea level and is 327.0m (1,073 ft) depth, and is drained by the Oirase river. With a surface area of 61.1 km², Towada is Japan's 12th largest lake, its bright blue color is due to its great depth. The lake is roughly circular, with two peninsulas extending from its southern shore approximately one-third into the center of the lake.

The lake is a popular tourist destination.

Lake Towada occupies the caldera of an active volcano, with large scale volcanic eruptions occurring approximately 55,000, 25,000 and 13,000 years ago. The most recent eruption left traces of pyroclastic flows as far away as the modern city of Aomori. The lake is a double caldera in that the inlet between its two peninsulas (called the “Nakaumi”) is the remnant of a secondary caldera which erupted and collapsed approximately 5400 years ago. The mountain continued to erupt well into the historical period, with the last recorded eruption occurring in 915 AD, devastating the surrounding area with pyroclastic flows, and covering most of the Tōhoku region of Japan with volcanic ash, leading to crop failures, climate change and famines.

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