Arguably, SDG 12.b is a high-impact leverage point due to its capability to induce green growth, which further triggers social development (health and education) by way of water. Financial assistance (SDG 17.3) and stakeholders’ participation in decision-making (SDG 16.7) are two overarching influences that strengthen system connections between nodes. Sustainably managing and protecting marine ecosystems (SDG 14.2) and reducing marine pollution (SDG 14.1) are the keys to solving the trash problem that Japan is facing.