This is really the best grilled eel I've had. Unlike many other unagi I've tasted, the ones here have a crispy, sauce-clinging exterior (thanks to the charcoal grill). It may not seem much, but the medium portion is rather filling - get the mini one or share the large with another person if you've a smaller appetite!
The space is crammed and queues are expected at the peak hours, so come here early!