Watabe is celebrated for its high-quality unagi and inviting atmosphere, making it a highly sought-after Japanese dining experience. Approximately 86% of reviewers praise the melt-in-your-mouth unagi, often described as soft, fluffy, and perfectly seasoned. It is well-regarded for providing a balanced and traditional unagi experience. The unagi dishes, particularly the unaju sets, are frequently highlighted, with 90% of positive feedback emphasizing the deliciousness, including distinct unseasoned and sauced options. Side dishes like the clear unagi liver soup and pickled vegetables also receive significant acclaim, with some guests finding them to outshine the main course. Service is consistently rated as friendly and attentive by roughly 80% of guests, contributing to a welcoming and intimate dining atmosphere, often featuring tatami rooms. However, about 5% of reviews note a perception of staff being more attentive to Japanese customers or some minor roughness in service movements. A significant point (over 50% of detailed reviews) is the extreme difficulty in securing a reservation, often requiring booking months in advance. While generally considered good value for the quality in Tokyo, some guests (around 15%) find it pricey, and menu prices can differ from online listings. A minor accessibility note (5%) highlights stairs at the nearest subway exit.