I had the wonderful opportunity of visiting Japan for cherry blossom season . If you time it right it’s normally in Tokyo at the very end of March and the first week in April.
The Meguro river is a wonderful place to wander along for cherry blossom and if your lucky enough to be there then don’t miss it out . The river is lined with lanterns and at night the trees are lit up it’s just such a magical place. I will never forget it.
When visiting Meguro I would recommend near by Daikanyama for arty coffee houses and quirky shops
Ebisu Garden Place which is built on a former beer brewery and now is Yebisu Beer, which is still brewed there and is a museum you can visit.
I also think the whole place is really pleasant and houses coffee shops and restaurants plus a department store.