Go up the exit for Hatchobori at Tsukiji Station on the Hibiya Line and walk toward St. Luke International Hospital, you will find Tsukiji River Park immediately.
It is a small park surrounded by buildings, but right next to it is the campus of St. Luke's College of Nursing, and beyond it is Akatsuki Park at St. Luke's College of Nursing, and it is a very calm place with greenery around it.
The cherry blossoms are in full bloom now, but there are many other flowers and trees, you can hear the singing of birds, and the hustle and bustle of Tsukiji Market in front of your eyes and nose is like another world. Although it is small, there is a day campground, so in the middle of Japan, it is less than a 10-minute walk to the intersection of Ginza 4-chome, and you can enjoy the luxury of having a barbecue while listening to the singing of birds surrounded by greenery.