About Submarine Submarine is a marketing agency established in 2018 and located in Tokyo, Japan. We assist our clients in engaging with their audiences through digital media by offering services in audio content creation, podcasts, content marketing, web design, and digital marketing. Podcast Production Our podcast production service, "PROPO.FM," helps clients express their message through audio. We manage all aspects, including idea generation, program planning, script development, recording, editing, and distribution. Content and Creatives We provide support in planning web content, design, production, SEO-optimized content writing, and operational assistance for businesses looking to expand into Japan. Digital Marketing We begin by aiding clients in digital marketing strategy development right from the initial concept stage. Our digital marketing services include: