Mt Fuji Eruption
In 1707 Mt. Fuji erupted to darken the sky over Edo, presently called Tokyo, 100 km east of the highest mountain in Japan.
It was apparently triggered by a great earthquake of a magnitude 8.6 which occurred 49 days before the Mt. Fuji eruption. The eructation continued for two weeks, causing huge damage to nearby villages and towns. It was the last one of three major eruptions of Mt. Fuji which were recorded in past documents left in Japan.
This eruption is called the Great Eruption of the Ho-ei Era. The preceding one happened in 864. So, Mt. Fuji might not come close to a dangerous state for a new eructation for 500 years or so if its eruption is so periodical.
But recently Japanese scientists find that Mt. Fuji is now in a dangerous condition. A huge amount of magma is now accumulated under the ground of the mountain. By analyzing air photos, they found that there are many dikes and concatenations of rocks on the mountain. They seem to stop flow of magma from the underground to the surface. But if a big earthquake in a scale of magnitude 8 should occur, those dikes would be broken and separated to allow magma to run up to the surface and to the air. Energy being accumulated for 300 years can be released from Mt. Fuji with one big earthquake. And Mt. Fuji is close to a big seismic source called the Nankai Trough.
The Nankai Trough is a submarine trough located south of Japan's island of Honshū, extending approximately 900 km offshore. In plate tectonics, the Nankai Trough marks a subduction zone that is caused by subduction of the Philippine Sea Plate beneath Japan, part of the Eurasian plate (Kanda et al., 2004).
The Nankai Trough is the near-surface extension of a zone of active seismicity that dips beneath SW Japan.According to study the probability is between 60 and 70% for an eruption with the magnitude of M8.0 or more to occur within 30 years in the Nankai Trough. (Nankai means a south sea in Japanese.)
http://en.wikipedia.org/wiki/Nankai_Trough
http://www.fujisan-net.gr.jp/english/4_04.htm
In conclusion, it is very dangerous to hold Olympics in Tokyo in 2020. It must be carried out in Istanbul. The Fukushima Daiichi nuclear disaster, a higher possibility of occurrence of a big in-land earthquake around Tokyo and this possible Mt. Fuji eruption make the possible Tokyo Olympics so dangerous, though Tokyo was the venue of the 1964 Olympics when science was not so advanced as it is today.
The International Olympic Committee must choose Istanbul for the 2020 Olympics not only for peace and prosperity of the Islamic world but also for physical safety of Japanese and foreigners.
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Luk 7:31 And the Lord said, Whereunto then shall I liken the men of this generation? and to what are they like?
Luk 7:32 They are like unto children sitting in the marketplace, and calling one to another, and saying, We have piped unto you, and ye have not danced; we have mourned to you, and ye have not wept.