find your favorite SAKE!
If you want to find your favorite Sake, go to Hasegawa Saké Shop （はせがわ酒店）, OMOTESANDO HILLS（表参道ヒルズ） or Tokyu Futakotamagawa RISE （東急二子玉川店） (http://www.hasegawasaketen.com/shop/).
They have counter seats, and you can drink a cup of Sake from their choice by paying some amount. You can try some Sake by glass.
You can buy the bottle you prefer.