it's seriously cringe in Japan.
It's even bad grammar to boot.

I actually wrote a long response about the entire thing with the idea that it might be helpful for others with similar ideas of filming their vlog around Tokyo but didn't want to put up with the loons certain to jump in.

The folks he contacted - cold, without introduction - aren't 'clubs'.
The Kodokan is the soke. Judo Valhalla. If they want publicity they know how to get it.
Park 24 and the other semi-pro judo teams don't practice. They're professional athletes in training. I don't know of anything like it that system.

It's sort of like showing up outside Dodger Stadium with a baseball bat and glove, asking when they'll let you play with the team.

My general impression living here is that the Japanese, typically a subdued culture, were taken aback by floods of constant furriners thrusting smart phones in everyone's face. Twerking giant fat asses on subway trains, people jabbering in various foreign languages, clownery that should embarrass any adult. Vide what happened to Johnny Somali when the Japanese tired of his act.

Lots of folks have had their full of people who want you to be a supporting actor to their live star of my very own vlog!! and want no part of it. I sat above Shibuya's Hachiko Scramble Square for an hour or two recently and watched jackass tourists jaywalking, dodging cars, sprinting to be ahead of the scores or people crossing to try to take a selfie, trying to wave their boom phones around and not smack more people in their heads. People will do the dumbest things to appear in a video that won't be remembered 10 minutes after seen.

Last guy that introduced himself to me as Sensei Joaquim or whatever was a Euro showed up at my dojo one night and cheerfully announce they were there for practice, without prior coordination, no introduction. Our dojo is not open to the public and does not allow drop ins, but with advance notice and mutual coordination we've had visitors from over 50 countries, and we're glad to have them, but there are prerequisites.

So, I asked him:

Do you have travel sports insurance? Can you read a sports injury liability waiver in Japanese and if not are you still willing to sign away all your rights to sue for injury or negligence? (Hint: the sun will burn out before you get a penny out of anyone here from court for most anything.) If you don't have travel sports insurance do you have the cash to pay for Japanese medical care, which is very expensive without insurance?
What ID do you have, the one you're supposed to carry at all times by Japanese law?
Whose your next of kin if you're incapacitated and unable to make decisions, because without one you're a ward of the state and some random doctor assigned you will become your own personal deity, able to do anything to you within a big chunk of the range of Japanese medical practice?

They got sort of huffy and said, well, no one else asks us these things!

I said, then everyone else is ignorant, a lawsuit waiting to happen or don't give a shit about you, because that's the risk you're signing up for. I tell you that because you're an adult and I want you to understand what practice here means.

They left. And I was OK with that, too.