But they're not the target audience.

I'm not sure that will happen. But I would like to see that happening in Japan too.

I think could happen, there's many adults collecting toys there.

What's evidence do you have it exist? I don't see any report of something similar to Kidult culture in the US or Japan. I'm not sure if you heard but Toys R Us has already closed, and will cease to exist.

There's was a toys r us store in Japan too ?

I'm sorry, I don't understand what you're saying.

What toys r us have to do with Japan ?

Toys R Us has a presence in Japan (161 stores in Japan, so I have to assume they're going to close). Also I apologize for not understanding your post. Do you have evidence that Japan has a Kidult culture like South Korea, because I'm not sure if that exist. If it did, I would've known about it.

There's a plenty of otakus there and maybe could be something similar.

The difference between Kidult culture in South Korea and Japan. Kidult culture in South Korea looks more mainstream where in Japan, it still seem as niche.

South Korean 'kidults' aren't shy about ordering the Happy Meal

South Korean ‘Kidults’ Obsess Over Kids’ Toys

Korean ‘Kidult’ Phenomenon – Adults Embracing Their Inner Child Is a Trending Business

Famous Japanese ‘Kidult’ Toy Stores to Open in Korea

Line between Korean kids and adults blurs


Also it doesn't help that K-pop idols are also making Kidult culture in South Korea look normalized:

https://www.youtube.com/watch?v=9kQ66PE9kwU

I don't see anything like this in Japan where Kidult culture is normalized and mainstream.