| Company Name | URL |
|---|---|
| All Japan Seamen's Union | http://www.jsu.or.jp/ |
| China Classification Society Japan Co., Ltd. | https://www.ccs.org.cn/ |
| Consulate General of REPUBLIC of PANAMA | http://www.embassyofpanamainjapan.org/ |
| Frontiers Ltd. | |
| General Federation of Coastal Vessels Association | http://www.zenkaiun.or.jp/ |
| Japan Association of Foreign trade Ship Agencies | https://www.jafsa.jp/ |
| Japan Captains' Association | https://www.captain.or.jp/ |
| Japan Coastal Tanker Association | http://naitan.or.jp/ |
| Japan Federation of Coastal Shipping Associations | http://www.naiko-kaiun.or.jp/ |
| Japan Marine Engineers' Association | http://www.marine-engineer.or.jp/ |
| Japan Marine Science Inc. | https://www.jms-inc.jp/ |
| Japan Maritime Public Relations Center | https://www.kaijipr.or.jp/ |
| Japan Sea Cadet Federation | http://www.jsf-japan.or.jp/ |
| Japan Ship Managers Society | https://www.senpakukanri.com |
| Kondo Marine Memorial Faundatian | http://www.kondouzaidan.com/ |
| Liberian International Ship & Corporate Registry | http://www.liscr-j.com |
| Minato CPA & Maritime Office | http://minatocpa.com/ |
| New Japan Surveyors and Sworn Measurers Association | https://www.shinken.or.jp/ |
| Nihon Coastal Tug Association | |
| Nippon Kaiji Kyokai | http://www.classnk.or.jp/ |
| The Japan Association of Marine Safety | https://www.nikkaibo.or.jp |
| Yamagata Maritime Institute | https://www.ymf.or.jp/ |
| Zenkoku Naiko Yuso Kaiun Kumiai |