The conventional approach to maritime transportation is set to evolve gradually with the advent of 3D―digitalization, decarbonization, and decentralization. Although the maritime industry is typically cautious and prioritizes safety, it is increasingly recognizing that the 3D advancements are an unavoidable trend. Digitalization refers to the integration of technological advancements into maritime transport as per the Fourth Industrial Revolution. A significant aspect of this is the emergence of autonomous vessels and electronic bills of lading. As digital technology progresses, research in navigation technology is aiding in the development of autonomous ships, while electronic document interchange is being advanced to develop electronic bills of lading based on NFT or blockchain. Since the Paris Climate Change Agreement, there has been significant global dialogue on decarbonization, and regulations on carbon emissions are being tightened in the shipping industry, particularly by the IMO and the EU. As a result, maritime transport will need to undergo a gradual transformation towards a developmental approach in the future. Additionally, maritime law, effective countermeasures, and insurance policies will need to adapt to the challenges of the 3D era. In this paper, the writer discusses in detail, various issues pertaining to digitalization and Decarbonization and based on the discussions shared, I hope that conversations regarding maritime law and maritime insurance related to future concepts applicable in the upcoming 3D era can become more actively. Although the topic of Decentralization requires further investigation as well, the author will address it in the next article.