Yes, look for this Tour from Klook, i used Klook when I went there last May 2019. Its around 100-120 USD per pax. They have for October 15.

Helo there. There’s a flower season schedule on their official website. In december, there are few kinds of flowers. The main event in december will be the illumination show. It’s open from the end of oct to the beginning of february. It has received the best illumination show in japan for 3 straight years, so, yes, really worth it even in december. Hope this helps🙏🏻

Unfortunately for Hitachi Seaside Park won't have much flowers at the time when you arrive, but if you still have time, probably around mid August, there is Sun flower, Zinnia and Kochia green. This unique Kochia bush will turn yellow and red around September to October. Try Google flowers in Japan, you may find some park with certain flowers blooming in July.

I guess some (not all) nemophila and other flowers will fall down already. Also there are sea coast and funpark. I hope you will enjoy your time here.

Sorry I dont know cause I use train from Tokyo

if you want see kochia only in October you must check it when the park is ready cause not every time is available

im stay at this park about 3 hours

its depends of your interesring i spend about 3 hours

Half day. 3 hrs minimum - 5 hrs. considering taking pictures and roaming the whole area. it is a large area where field of flowers are everywhere. You can also ride a bike or take their tourist service car to get around.