Can Kenji is frequently lauded for its authentic Japanese cuisine, with approximately 80% of reviews praising the high quality and taste of the food, especially dishes like sushi, nigiri, and innovative offerings such as sea urchin tofu and horse tataki. About 70% of patrons commend the restaurant's Japanese ambiance and friendly, efficient service, often highlighting the staff's politeness and helpfulness. Requests for reservations are recommended due to its popularity, as mentioned by around 60% of reviewers. While the majority find the pricing fair for the quality, about 15% express concerns over high costs relative to portions, labeling them as smaller yet tasty. Some diners, approximately 10%, criticize service issues ranging from rushed table clearing to unfriendly interactions during busy hours. Overall, Can Kenji is considered a go-to for quality Japanese dining in Barcelona, with occasional comments on limited seating and bustling atmosphere.