Sure it gets crowded, but not nearly as badly as Ueno or other major spots, and unlike those, where the bulk is students intent on drinking, Asukayama's hanami-ers tend to be mostly families and seniors. Spots to spread your required "blue sheet" picnic blanket can be tricky to find and garbage can get out of hand at the peak of the blossoms
but even then peace is not hard to find in the gated part of the park off to one side. This grassy and forested area has a no eating and drinking rule but some people sit on the lawn and artists sit in front of easels sketching. There may be only a few sakura trees in this area, but they stand out against the surrounding greenery
did I mention there were THREE museums in the park? (I admit that my love of museums and history may have something to do with my love of Asukayama... ;)
But in the evening, after the museums close, most of the hanami-ers head home but the sakura remain and seem to glow in the early evening light.