Well I did publish the Kaidan setting of Japanese Horror (PFRPG), with the goal of more authenticity than previously published Japan analogs. But my development of the setting focused on specific cultural aspects and taking a deep dive into each subject, shooting for verisimilitude. At the same time, I didn't shoot for every aspect of Japanese society. Completionist was not the goal, rather a focus on the aspects I've chosen and only those. So there were lots of aspects of Japan that aren't included, as I felt they were unnecessary, and if I were to be faithful to every aspect of Japan, done with the nuanced detail I achieved, instead of a 240 page Gamemaster's Guide, it would have been a 30 volume set. So you can be true to a given culture, and not require covering every possible thing - only the things that matter enough to convey the intended theme. I've been told that I did Kaidan well, by more than a few...