We just got back from the ultimate Japanese buffet dinner @ Minado in Natick, MA. For $29.95 (weekend dinner rate, drinks, tax, and tips not included), you get to feast on a variety of sushi, nigiri, sashimi, salads, hibachi, noodles, other cooked food and desserts. I am basically just targeting the sashimi stuff, salmon sashimi being my #1 choice. The seafood selection is very fresh and they replenish the food quite promptly.
If you love Japanese Food and Sushi like I do, I would recommend for you to give it a try!