2018年07月21日

'Lake Kussharo' in the east of 'Hokkaido' is Japan's largest caldera lake.

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Kussharo caldera slightly exceeds 'Aso' caldera in 'Kyushu' in size, boasting itself to be the largest caldera in the country. The specific size of it is 20 kilometers from north to south, and 26 kilometers from east to west. Ancient Lake Kussharo was a round shape as it was formed entire inner area of this huge caldera, but now it has become almost half size with a green pea shape. Japan's sixth largest lake though, aquatic life can be hardly found here since this lake water takes on rather strong acid pH. There stands one island in this lake, with the perimeter of 12 kilometers and the height of 355 meters above the surface of the lake. And this island has a crater on top. As many hot springs are gushing out in this vicinity, natural hot water gradually oozes out even from digging by hand on the lake shore.

Licensed tour guide/travel consultant,
Masahisa Takaki.

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posted by masahisa at 11:42 | Hokkaido | このブログの読者になる | 更新情報をチェックする

2018年07月19日

'Lake Mashu', in the mountainous area of the eastern part of Hokkaido, is known as the world's second highest transparent lake after 'Lake Baikal' in Russia.

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Lake Mashu, which was formed by volcanic eruption, is a caldera lake. As being located remotely and secludedly, with no rivers flowing in and out, it features very transparent water. A small island called 'Kamuishu' in the middle of the lake and 'Mashu-dake' active volcano on the right-hand of the photo are seen. The transparency of this lake actually was a little better than Lake Baikal from 1930 to 1946, that is, Lake Mashu used to be world's No.1. However its transparency has gradually deteriorated since 1952.
The effective countermeasures are hard to find, because the cause of the water contamination is still unknown in spite of the study.
Even so, the water of the lake shows beautiful blue so-called 'Mashu Blue' on glorious days.

Licensed tour guide/travel consultant,
Masahisa Takaki.

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posted by masahisa at 13:12 | Hokkaido | このブログの読者になる | 更新情報をチェックする

2018年07月01日

'ATOSA-NUPURI', also known as 'Hokkaido Io-zan', in 'Teshikaga Town', Hokkaido, is an active volcano 512 meters high.

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Atosa-Nupuri means a naked mountain in 'Ainu', to be more precise, a mountain without trees and plants due to poisonous volcanic gas, terrestrial heat and strong acid soil. In Japan, known as a volcanic country, ten different io-zans, which literally means sulfur mountain, are found and this mountain is a leading one. Sulfur mining operations had been actually undertaken from the second half of the 19th century to 1970. Many sightseers in the country and overseas visit here on the way to neighboring 'Kawayu-onsen' hot spring resort and 'Lake Kussharo'. The discharged vapors from the fumaroles on the surface of the mountain, with the yellow sulfur on the rocks, are seen here and there as shown in the pictures. It's not prohibited to enter most parts of the foot of the mountain and snow doesn't accumulate a lot here because of the terrestrial heat.

Licensed tour guide/travel consultant,
Masahisa Takaki.

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posted by masahisa at 09:09 | Hokkaido | このブログの読者になる | 更新情報をチェックする