Googled and found this...
Best Time to Visit
Visit the park during the off-season when it’s generally less crowded from October to December. It’s also ideal to book a visit on lean days like Tuesday, Wednesday, or Thursday. If you want to avoid crowds, refrain from visiting during Japan’s public holidays, the Golden Week, festivals, and the New Year holidays. Peak season is from the second week of July to August.
But another website forecast Tue - Thu in Nov crowds are higher than Friday/Sunday in the past.....
LOL most probably I will visit on a Tue and ask my kids to wake up earlier and try to get there to Q before the Gate open.
Thanks all for your the valuable inputs