Unfortunately not. Depends on the year but usually it’s over by the second week of April (Tokyo). If you visit the north of Japan you might have the opportunity to be able to see it.

Yes!! Great time to be there🤗

Not really, in general there is very little public parking in Tokyo and if it is available it is very pricey

No; it is a short walk from the subway station and is basically a walkway along the moat of the Imperial Palace. There is a boat ride you can do which I believe will cost you something. I don't know what the fee was as we didn't try as there was a line. It was in the middle of cherry blossom season. Many many people walking, eating snacks and enjoying the ambiance.

In august its just a Moat surounded by water it may be nice if you take a boat and row it in the canal a bit other that that its nothing special. Beter go to Shinjuku Gyoen and Hie shrine finish off in Askusa temple.

In autumn, foliage colours are not as impressive in the garden, compared to spring time sakura blooming week. Still a nice garden to stroll in, though. Might catch some colours in between.

Fall season at Chidoriga Fuchi is also nice. Usually end of November is good to see colored trees. however, the best season of coloring trees depends on weather and air temperature this year.

Guess around Apr. 3 to 6 will be cherry's full bloom in Tokyo. Apr. 8, although the time will little bit late from full bloom, you'll enjoy flower's pedals falling like snow. The time, its a kind of wlak way and so you don't need afraid closing.