Question regarding adding release credits that are not included in the "Relationship Types."

Some types of credits are not included in the “relationship types.” For example, there is the “director,” which is often found in Japanese music album releases. However, I’m unsure of the exact role of this studio personnel and how it differs from the producer. There are also different types of managers, coordinators, promoters, supervisors, artwork staff, etc.
What is the best way to sort those types of release information if we want to store as much as possible? Should we use “Misc. Support” or annotations?

Indeed, director has not yet been sorted out in CreditTranslations/Japanese.

Can you use some misc/other relationship with credits as director?
It would be good, IMO.