org/licenses/by-sa/2.5CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue English Schematic of an expedition aboard the Japanese drilling ship D/V Chikyu
{{Imagecredit|credit=Kotaro|captureDate=2012-05-20|location=Choshi|source=Own Work|caption=Chikyu no Marukumieru Oka Observation Hall|descr (Import from wikitravel.org/shared)
jp/kiosk/chikyu_con/A1/23/002166@lang=jpn.html Explanation by the National Museum of Nature and Science http://shinkan.kahaku.go.jp/kiosk/chikyu_con/A1/23/002166@lang=eng