I bought the Tomorrow deck, and this card has the samurai bug, but in the Samurai checklist, it does not show. So, it is samurai legal?
All things have a price
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.
I bought the Tomorrow deck, and this card has the samurai bug, but in the Samurai checklist, it does not show. So, it is samurai legal?
What you called the "Samurai checklist" is really the Samurai Edition checklist. That is, it lists cards in that set only.
The list of all Samurai legal cards is is on the new rules page, here.
On: Tomorrow