Tiger sharks are not commonly found in Japanese waters due to the cooler temperatures and unsuitable ecosystem. While they may pass through during their long-distance migrations, they do not stay there permanently. Shark tourism is a popular industry in many parts of the world, and there are still opportunities for shark enthusiasts to observe other species in Japan's waters. It is important to take precautions when swimming in areas where sharks may be present, and conservation groups are working to protect vulnerable shark species like the tiger shark.