Shimanami Co., Ltd. has been recognized as a passenger ship operator that is actively working to ensure safety above the standards required by law, and has received "First Stage Certification" under the "+ONE Mark" system, which was established by the Ministry of Land, Infrastructure, Transport and Tourism and the Japan Association of Maritime Agents (General Incorporated Association) with the aim of enabling users to select operators that are proactive in terms of safety and promoting operators' efforts to improve safety.
Here 's an overview of the "+ONE Mark" system