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.
A player, 1 December 2011
Does Hitomi Dajan's ability count Tamori Futaba's Ring?
Hitomi Dajan (Dark Journey Home) Battle: Target a player with a unit in this battle. Dajan gains 1F/1C until the end of the battle for each of that player's Elemental Rings. You cannot target the same player with this action more than once per battle.
Tamori Futaba (Rise of the Shogun) After Futaba enters play, create a blank Ring card in your home. After she leaves play, destroy that Ring.
http://rules.l5r.com/Older_Cards#Card_types For cards printed prior to KHAN'S DEFIANCE: Card types All instances of the term "Elemental Ring(s)" should be considered to read "Ring(s)". [ADDED April 28 2008]
Search gives me Zen's rulings from 2006, prior to the (I assume) Legacy Council's ruling above. Thank you.
Brook Cunningham (rules official), 1 December 2011
Does Hitomi Dajan's ability count Tamori Futaba's Ring?
Hitomi Dajan (Dark Journey Home) Battle: Target a player with a unit in this battle. Dajan gains 1F/1C until the end of the battle for each of that player's Elemental Rings. You cannot target the same player with this action more than once per battle.
Tamori Futaba (Rise of the Shogun) After Futaba enters play, create a blank Ring card in your home. After she leaves play, destroy that Ring.
http://rules.l5r.com/Older_Cards#Card_types For cards printed prior to KHAN'S DEFIANCE: Card types All instances of the term "Elemental Ring(s)" should be considered to read "Ring(s)". [ADDED April 28 2008]
Search gives me Zen's rulings from 2006, prior to the (I assume) Legacy Council's ruling above. Thank you.
Yes, Dajan counts Futaba's Ring.
Per the Legacy-interpretation rule you quoted, there is no functional difference between an "Elemental Ring" and a "Ring".
(Fun fact: The Rise of the Shogun expansion in which Futaba appeared actually marks the first set in which the keyword "Elemental" was dropped wholesale from the game.)