He puts his nominee there, his other person, the person who may just do it for him under a nom de plume.
There is not a nom de plume on it, and it is not a round robin.
The author writes under a nom de plume due to the sensitive nature of her source material.
His "nom de plume" has several variations based on transliterations.
The equivalent concept among writers is called a nom de plume or pen name, while the term ring name is used in professional wrestling.
This could be a nom de plume but it could also be an accolade.
This became his nom de plume, and his wife and sons later adopted the same spelling.
Kotabe sometimes works with his wife under the nom de plume.