| Significant figures (error propagation - official version - basic edition) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=374 | Course '有効数字（誤差の伝搬―正式版―基礎編）' |
| Significant figures (error propagation - official version - applied problems) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=375 | Course '有効数字（誤差の伝搬ー正式版―応用問題）' |
| Coprecipitation and iron coprecipitation | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=377 | Course '共同沈殿と鉄共沈' |
| Sensitivity improvement method (concentration of gas components) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=378 | Course '感度アップの方法（ガス成分の濃縮）' |
| Training of Marine Ecology 4: Behavioral Observations of Marine Mammals | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=380 | Course '海洋生態学実習 4: 海生哺乳類の行動観察' |
| How to use pipettes (must be followed) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=381 | Course 'ピペットの使い方（必ず守ること）' |
| How to use a pipette (tips for correct use) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=382 | Course 'ピペットの使い方（正しく使うコツ）' |
| Adjust the standard sample using a precision electronic balance | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=383 | Course '精密電子天秤を使って標準試料を調整' |
| Dissolved oxygen measurement (water sampling procedure and titration procedure) | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=384 | Course '溶存酸素測定（採水手順と滴定手順）' |
| Learning resource - Induction of ovulation of Japanese eel | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=390 | Course '【教材】ウナギの排卵誘導' |
| Learning resource - Artificial insemination of Japanese eel | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=391 | Course '【教材】ウナギの人工授精' |
| Learning resource - Verification of fertilized eggs of Japanese eel | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=392 | Course '【教材】ウナギの受精卵の確認' |
| Learning resource - Measuring market samples of heteropterans | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=400 | Course '【教材】異体類の市場標本測定' |
| Textbook of Basic Laboratory Works on Life Science | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=450 | Course '基礎生命科学実験テキスト' |
| Sources of Artificial Radionuclides | Go to the "Chemistry of the Sea" lot | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=457 | Course '海洋化学（by Ooki）のもくじ（教科書ダウンロードあります）' |
| Sources of Artificial Radionuclides | Previous Course (Introduction to Marine Sediment Observation) | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=281 | Course '海洋堆積物観測の紹介' |
| Sources of Artificial Radionuclides | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=453 | Course '人工放射性核種の供給源' |
| 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）' |
| Ocean Observation Methods | Japanese | https://repun-app.fish.hokudai.ac.jp/course/view.php?id=467 | Course '海洋観測手法' |
