There are two underwater tour boats、In both cases, when you enter the ship, you can see the cobalt blue of the lake that you can see from the window.。
The position of the window is 2m deep and the size is about 70cm square.。
Approximately 16 windows show the bottom of the lake。
2Inside the ship、The emerald is a double-decker behind the deck.、The submarine type that can take the lead of the ship is the Sapphire.。
Both passengers can accommodate up to 50 people。

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Columnar joints(Columnar joint)

Below the surface of the lake, "columnar joints"(Columnar joint)Called、A cliff-like scene spreads out。
This is when the caldera is generated、In the crack created when the magma is cooled rapidly and contracted、It continues to this day as a highlight of Lake Shikotsu。
The state of the lake bottom that can be seen clearly、It should impress you at the same time as recognizing the high transparency of Lake Shikotsu.。
Rough rocks、Ripples of sand like a brush ... The beauty of nature that you can't usually see is the world of Lake Caldera.。
Tip if you're lucky(Kokanee)You can also meet。
Not only the beauty of the lake、The nature surrounding the lake is also a big attraction。
The contrast between blue and green woven by nature、Produces a wonderful landscape。