Sashimi is traditionally eaten with chopsticks in Japanese culture. However, there is no strict rule stating that it must be eaten with chopsticks. In modern times and outside of Japan, it is common for people to eat sashimi with a fork and knife or even their hands, depending on their comfort level and cultural practices.
Using chopsticks can be more challenging for those not accustomed to them, and some people may prefer using utensils they are more familiar with. When served at restaurants outside of Japan, you may find that many places offer both chopsticks and regular utensils to accommodate various preferences.
The key is to enjoy the sashimi in a way that is comfortable for you while being respectful of the cultural context if you are dining in a traditional Japanese setting. Regardless of the utensils used, sashimi is best appreciated by savoring the delicate flavors and textures of the fresh raw fish.