| Date | Description |
|---|---|
| 2015-01-19 | update robots_txt_status www.summit-japan.jp: 200 => 404 |
| 2014-12-12 | update robots_txt_status www.summit-japan.jp: 404 => 200 |
| 2014-09-07 | update robots_txt_status www.summit-japan.jp: 200 => 404 |
| 2014-08-05 | update robots_txt_status www.summit-japan.jp: 404 => 200 |
| 2014-04-24 | update robots_txt_status www.summit-japan.jp: 200 => 404 |
| 2014-03-24 | update robots_txt_status www.summit-japan.jp: 404 => 200 |