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One of the two Expo ’70 Time Capsules made to commemorate the Osaka Expo in 1970 was opened for the first time in 30 years in March 2000.
The time capsules are intended for leaving to mankind 5,000 years into the future contained 2,098 items that had been specially selected as cultural artifacts as of 1970. Created out of a collaboration between Panasonic and The Mainichi Newspapers, the time capsules had been buried in Osaka Castle Park.
There are two time capsules with identical content, one buried 10 meters deep underground, the other 15 meters. The time capsule unearthed this time, the one buried 10 meters underground, was to be inspected in the year 2000 and then once a century thereafter. The other time capsule is to be opened in the year 6870.
Of the 2,098 items in the time capsule unearthed, 173 items were inspected. Though some of the bacteria samples had perished, the rice cooker and television set worked normally. In addition, the experimental plant seeds had sprouted and most of the other items had been kept in the same state and working condition they were in when first placed in the capsule.
After the inspection completed, the capsule was buried again in November. The next time it will be opened and inspected is the year 2100.
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