Against the background of efforts to achieve carbon neutrality and changing international circumstances, various marine sectors are expected to contribute to industrial development, regional revitalization, environmental protection, and boosting global competitiveness. However, many marine industrial technologies have yet to be commercialized. Therefore, at the Ocean Technology Forum, we gathered opinions from a wide range in industry, government, and academia, and compiled the 2022 (Reiwa 4) Ocean Technology Forum Proposals. In this article, I will introduce its content which covers individual issues in marine science and technology as well as ways for building an environment to meet these issues.