Sei has been able to lead conceptual design projects and develop new ideas of automation and aesthetics through various visual mediums using vibrant color with a vast range of mixed materials allowing him to develop a relationship with his work. He has done solo exhibitions in Los Angeles and New York, as well as participated in art fairs in Miami Art Basel. He has also been awarded the at Tokyo Designers Week and has worked with brands like Coca-Cola, Pepsi, Mattel, and The Andy Warhol Foundation. His deep involvement with charity and philanthropy has influenced his uplifting and positive messaging to push humanity forward. He is a co-founder of a Nonprofit organization called Kids Earth Fund which is based in Japan. His work has been publicly exhibited all over the world since a young age. The foundation has been around for 30 years and has been nominated and selected as the final shortlist for the Nobel Peace Prize of 2018.

The bold visual aesthetic and organic textural quality of his work creates a conversation about the obscurity between art and design. His unbounded method of combining a variety of materials ranging from paint and wood to resin and sculptures gives the work layers of depth. Sei presents a new perspective and flares to iconic imagery with a conscious yet humorous message on social or political issues.