Knowing if it is a romance, thriller, variety show, or documentary would narrow the search significantly.
A specific internal identifier for a media company (such as NHK, Fuji TV, or Netflix Japan) that hasn't been marketed under that alphanumeric name. Knowing if it is a romance, thriller, variety
Even small fragments of the story can help identify the work. Knowing if it is a romance
(e.g., a specific streaming site, a physical DVD/Blu-ray, or a social media post). a specific streaming site