April 4 Cherry Blossoms in Tokyo

We will arrive on April 4th in Tokyo which is after the best viewing period. How likely can we still see a good amount of cherry blossoms? Can you suggest where we should go in Tokyo for cherry blossoms (April 4 to 9)? Thanks in advance.

If there is no strong wind and rain, you may be able to experience the very tail of the main season. If not, then the advice on the following page should be useful:
https://www.japan-guide.com/e/e3050_late.html

You can check one of the most recent forecasts for "Tokyo on Apr 4" here.
https://weathernews.jp/s/sakura/search_result.html?area=TOKYO&mon=4&da...
Lake Okutama looks the best. Full bloom on Apr 4 and Sakura blizzard on Apr 10.
https://weathernews.jp/s/sakura/spot/112/index.html
Komine Park has two entries. Somei Yoshino Apr 5-12 and Yamazakura Apr 8-12.
https://weathernews.jp/s/sakura/spot/4484/index.html
https://weathernews.jp/s/sakura/spot/113/index.html
The others are not in a good condition, after the peak.
Showa Memorial Park: Sakura blizzard on Apr 6.
https://weathernews.jp/s/sakura/spot/4404/index.html
Tokyo Summer Land: -Apr 5
https://weathernews.jp/s/sakura/spot/4487/index.html
Hamarikyu Garden, Musashino Park, and Hamura no Seki: -Apr 4.
https://weathernews.jp/s/sakura/spot/4425/index.html
https://weathernews.jp/s/sakura/spot/4421/index.html
https://weathernews.jp/s/sakura/spot/111/index.html

Keep watching the updates on those sites. Or, just check this site for "The Best Sites Now in Tokyo" on the very day or the day before.
https://hanami.walkerplus.com/list/ar0313/ss0004/