Yes, there are several all-you-can-eat sushi restaurants in Boston that offer a wide variety of sushi options. Here are a few examples:

• Sakura Japan: Located in the Back Bay neighborhood, Sakura Japan is known for its all-you-can-eat sushi buffet. They offer a range of sushi rolls, sashimi, and nigiri options. You can find more information on their official website.
• Yoki Express: Situated in Brighton, Yoki Express is another popular all-you-can-eat sushi spot. They have a diverse menu with various sushi rolls, appetizers, and even hot dishes. Check out their website for more details.
• Fin's Sushi & Grill: Located in the Financial District, Fin's Sushi & Grill offers an all-you-can-eat sushi experience during lunch hours. They have an extensive selection of sushi rolls, as well as other Japanese dishes. You can find more information on their official website.

Please note that availability, prices, and menus may vary, so it's always a good idea to check their websites or contact the restaurants directly for the most up-to-date information.

References:

1. Sakura Japan Official Website
2. Yoki Express Official Website
3. Fin's Sushi & Grill Official Website