Full paper：海洋開発 Published on 31st January 20198th January 2026 by yasuda-t Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: 8th April 2019 all-day Asia/Tokyo Timezone 2019-04-08T00:00:00+09:00 2019-04-09T00:00:00+09:00