Publicly available information - Historical Chronology (1951-1975)
1951
Following the perfect execution of the [Rooftop Plan], the island country was completely blocked and no strangers were allowed to enter.
The world structure stabilizes and the L war begins.
However, while the two superpowers are carrying out related activities around the world, they also privately cast their sights on the disappeared country. They secretly organize explorers and explorers who have great interest in Japan and are willing to dedicate themselves. Scientists go there.
June 1956
The nine-member university expedition team led by Soviet explorer Diatlo originally planned to explore the Ural Mountains, but by chance, they responded to the call to Japan.
Became the first expedition team to successfully survive for more than a month in Japan, and sent back very important information to the country.
This intelligence directly caused the Soviet Union to shift its strategic focus, abandon other L war plans, and instead allocate a large amount of resources to explore the island country.
March 1962
Mi also began to shift its strategy to the island, and the L war pattern completely changed.
The "direct relationship between the corner and the disappearance of humans" has been officially proposed around the world, and many countries have begun to send expedition teams into it.
More and more secrets are revealed, and the proportion of disappearances begins to decrease year by year.
January 1969.
Multinational expedition teams began to enter it in large numbers, and were able to ensure that the missing rate was less than 10%.
The international attitude toward Japan has completely changed. While encouraging exploration, it has also begun to formulate relevant laws and regulations. People who have been to Japan are prohibited from returning to the country and can only be restricted to live internally.
August 1975.
The United Nations proposal was passed, and the E.I.A (Explore, Investigate and Analysis) World Bureau was established. (End of this chapter)