A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Regarding viewtopic.php?f=59&t=60294
If Hoshi Masujiro is the previous printing of Togashi Masujiro, identical in all ways except name, are the other "previous printings" of cards such as Bayushi Hisoka (Bayushi Goshiu exp2), Utaku Genshi (Utaku Uzuki), Isawa Oharu (Isawa Sze) also legal?
Regarding viewtopic.php?f=59&t=60294
If Hoshi Masujiro is the previous printing of Togashi Masujiro, identical in all ways except name, are the other "previous printings" of cards such as Bayushi Hisoka (Bayushi Goshiu exp2), Utaku Genshi (Utaku Uzuki), Isawa Oharu (Isawa Sze) also legal?
Hisoka no, Genshi no, Sze no.
No, there is not a hard and fast rule about it.