cook soba per package instructions until texture is to your liking, drain and rinse with cool water
mix together everything else other than the ice cubes (tomatoes, mirin, soy sauce, sake, sesame oil, and ginger) along with a heavy pinch of salt. adjust seasoning to taste
divide tomato mixture into two bowls and place an ice cube into each bowl
ready to serve! dip your soba into the tomato mixture, give it a swirl, and enjoy!