http://ikura.2ch.net/test/read.cgi/i4004/1344271242 has been crawled 356 times going all the way back to 8月 6, 2012.

A crawl can be a duplicate of the last one. It happens about 25% of the time across 420,000,000 websites. FAQ
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Note

This calendar view maps the number of times http://ikura.2ch.net/test/read.cgi/i4004/1344271242 was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.