Can I use custom slug in metadata ?

In my blog, I use Japanese character as a title. Blot uses a title as a slug to create URL of an article. But we never use Japanese characters for URL.

I know that we can specify URLs of articles in Link metadata. But I use "date and title" for Permalink format. I'd like to specify only slug instead of title on metadata of each articles. If I specify "apple" on Link metadata in an article, URL of the article should be "YYYY/MM/D/apple".