Important Notice: The inner market of Tsukiji Market closed on October 6, 2018 and moved to a new site in Toyosu where it reopened as Toyosu Market. Tsukiji's outer market, on the other hand, did not close and will remain in business.
Tsukiji Outer Market (築地場外市場, Tsukiji Jōgai Shijō) is a district adjacent to the site of the former Tsukiji Wholesale Market. It consists of a few blocks of wholseale and retail shops, as well as restaurants crowded along narrow lanes. Here you can find fresh and processed seafood and produce alongside food-related goods such as knives.
A visit to Tsukiji Outer Market is best combined with a fresh sushi breakfast or lunch at one of the local restaurants. The restaurants are typically open from 5:00 in the morning to around noon or early afternoon. Because most of the fish served and sold at Tsukiji Outer Market is delivered directly from Toyosu Market, this is one of the best places in Tokyo to enjoy fresh seafood.
Tsukiji Outer Market is located a short walk from either Tsukiji Shijo Station on the Oedo Subway Line or Tsukiji Station on the Hibiya Subway Line. The closest JR station is Shimbashi, from where you can walk to the market in about 20 minutes.
From Tokyo Station
Take the Marunouchi Subway Line from Tokyo to Ginza (3 minutes) and transfer to the Hibiya Subway Line to get to Tsukiji Station (3 minutes). The fare is 170 yen.
From Shinjuku Station
Take the Oedo Subway Line directly from Shinjuku Station to Tsukiji Shijo Station. The one way trip takes 20 minutes and costs 270 yen.
information source: japan-guide.com