Fujimae Tidal Flat at the Port of Nagoya, one of Japan's leading trade ports, is annually visited by over 20,000 migratory birds and known as a foremost paradise for wild fowl in Japan. Once a candidate for a disposal plant for Nagoya's burgeoning amounts of trash, outcry from city residents ended the plan. This also became an opportunity for making trash separation, a practice then unfamiliar to citizens, take root to reduce continually growing amounts of trash. However, Fujimae is now threatened by plastic trash. Plastic is resistant to natural breakdown, and through illegal dumping and littering, wind, disaster-caused unintentional release, and outflow via rivers, it reaches the ocean and impacts living things myriadly. We independently investigated amounts of plastics in Fujimae Tidal Flat mud, and tried to determine the actual state of the new trash problem confronting Fujimae, and how migratory birds that visit this paradise are affected.