| Column "Oceanographic Observation Etiquette" | japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=459 | Course 'コラム「海洋観測のご作法」' |
| Column "Those who attack the very edge of organic gas generation" | japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=461 | Course 'コラム「有機ガス発生のギリギリを攻める輩」' |
| Collection of courses in analytical chemistry | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=462 | Course '分析化学のコース集' |
| Analytical chemistry Index (by Ooki)(Link to video available) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=463 | Course '分析化学（by Ooki）のもくじ （動画へのリンク有）' |
| Column "Goldfish fluff is" | Link URL to offensive odor components (VOC research) in the sea | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=147 | Course '海洋の有機ガス（概要と補足）' |
| Column "Goldfish fluff is" | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=464 | Course 'コラム「金魚のフワフワが」' |
| Column "Seasickness and Research" | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=466 | Course 'コラム「船酔いと研究」' |
| Ocean Observation Methods | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=467 | Course '海洋観測手法' |
| CTD Observation | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=468 | Course 'CTD観測' |
| Water Sampling | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=469 | Course '採水' |
| Self-recording CTD | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=470 | Course '自己記録式CTD' |
| Natural radionuclides (outline of cosmic ray nuclides) | 放射性炭素同位体による年代推定（海洋化学コース）へリンク | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=144 | Course '放射性炭素同位体による年代推定法' |
| Natural radionuclides (outline of cosmic ray nuclides) | 溶存有機物の年代推定（海洋化学コース）へリンク | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=145 | Course '溶存有機炭素の14C年代推定' |
| Natural radionuclides (outline of cosmic ray nuclides) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=472 | Course '天然放射性核種（宇宙線核種の概要）' |
| Tritium (Tritium) - Details of cosmic-ray radionuclides - | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=473 | Course 'トリチウム（三重水素）－宇宙線放射性核種の詳細－' |
| CTD water sampling system | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=479 | Course 'CTD採水システム' |
| Introduction Course of Department of Marine Biology | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=480 | Course '海洋生物科学科の紹介コース' |
| Mini-Column "The ABC's of Oceanographic observation" | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=481 | Course 'ミニコラム「海洋観測のいろは」' |
| Radionuclides of carbon, beryllium, and iodine (Details of cosmic-ray radionuclides) | Radiocarbon isotope dating (link to Course in Marine Organic Materials) | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=1457 | Course ' Radiocarbon Isotope Dating Method' |
| Radionuclides of carbon, beryllium, and iodine (Details of cosmic-ray radionuclides) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=482 | Course '炭素、ベリリウム、ヨウ素の放射性核種（宇宙線放射性核種の詳細）' |
