Time Out says
Conger eels can grow up to three metres long in the wild, but you'll only find them cut up and cooked at Tamai, a venerable eatery that also sells eel-themed Hello Kitty figurines. This classic restaurant is housed in a handsome wooden building that dates back to 1953 and is perhaps the city's finest purveyor of 'that other kind of eel'.
2-9-9 Nihonbashi, Chuo-ku
|Transport:||Nihonbashi Station (Ginza, Tozai lines), exit C4; (Asakusa line), exit D3|
|Opening hours:||Mon-Fri 11am-2.30pm, 5pm-9.30pm; Sat, Sun & hols 11.30am-3.30pm, 4.30pm-9pm|