Describe the solution you'd like
I would like to see some Japanese railroads added.
For example, Shinkansen.
If it is not possible, I will delete this request.
Thank you.

If I said that, it would mean other trains as well, but that would be a bad idea, so I am not sure about it, but I have decided to go ahead with it anyway.
I found a Japanese train on the author's youtube page, so I just sent it to him as a last resort.

I think it's possible, with using the resource pack creator

So we just need to support it with patron?
Also, I will delete the post.
Thank you very much.

So we just need to support it with patron? Also, I will delete the post. Thank you very much.

no you can just make the train yourself

understood.
I will do my best to make it.
Thank you very much.
I don't know if I can distribute the resource pack, but I will try to make it.