1. Kurand Sake Market
This sake bar is on the fourth floor of the building located 5 mins walk on the west exit of Shinjuku station. Cozy place where you can find a lot of sake bottles in the counter.
What is special for this bar is you can enjoy unlimited drink for 3200 yen!! Once you pay, it's all you can drink. They have over 200 types of sake so try as much as possible and enjoy the differences. It is also allowed to bring some food and eat while drinking if you want.
2. Nihonshu Stand Moto (日本酒スタンド 酛 )
Moto is located in the basement of a building. Take the east exit of Shinjuku station and walk around 7 minutes. It's a standing bar with only about 12 seats and so you might want to go there early so you make sure you have a place to sit.
Enjoying the hidden and peaceful atmosphere in the bar, you can choose your sake from variety of options. Their staff will serve you sake in front of you. All cups of sake are around 400-600 yen. They also offer Japanese appetizers.
3. Kouya (香家)
Kouya is in very convenient place, less than one min on the west exit of Shinjuku station. Their seats are like a small room, where you can enjoy the private atmosphere.
They serve variety of sake and also Japanese food such as raw fish. If you have trouble choosing which sake you get, try "sparkling sake"! It is much easier to drink especially for those who don't know much about sake.
4. Torigen (鳥元)
Just 3 mins walk on the west exit of Shinjuku station, this Japanese bar is know for its good sake and Yakitori (焼き鳥/Japanese grilled chicken).
You can try some different kinds of sake with Japanese food. A cup of sake is around 400-600 yen. Also, have you ever heard of "Atsukan"? It's warm sake which is also common for the Japanese. Enjoy sake in the different way if you have already had cold sake before!
5. Totokichi (とときち)
Around 10 minutes walk from Shinjuku station, or 3 minutes walk from Shinjuku 3 chome station.
Totokichi is well known by sake lovers in Tokyo as they offer a selection of rare sake from all across the country that are difficult to get. Their food menu is also amazing. Especially seafood dishes like sushi are very fresh and high-quality that go well with the high-class sake.