I discovered this tiny tavern by chance, I entered because it didn’t look like the typical fake Japanese restaurant but it felt authentic. I must admit that the number of sake bottles on the shelter and their variety also played a big role in my choice and curiosity.
Saketeca Go is a really simple and “no frills” place with easy-going hosts that are really happy to answer to any question you have on sake. You chose your cup/glass from a wooden box and ask for something strong/sweet/flavoured/whatever comes into your mind and you can be sure they have it! I chose a hot sake and a matcha tiramisu cake which I still dream about.
Saketeca Go is also a restaurant with a short menu that changes quite frequently with Italian and Japanese food: no sushi/sashimi/nigiri but authentic cooked food that Japanese people really eat at home (my Japanese flatmate has explained me that sushi is mainly eatean in restaurants, while home cooking is quite different). The cook also mixes ingredient of the Italian and of the Japanese kitchen, as far as I have seen the result is worth a try.