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, 4 May 2012
Building from this: viewtopic.php?f=59&t=97763#p1290838
Does this mean that, in subsequent turns, Konetsu may choose to remain bowed because he used the ability when he had it, even though he no longer has the ability that allows him to choose to remain bowed?
Jon Palmer (rules official), 5 May 2012
Building from this: viewtopic.php?f=59&t=97763#p1290838
Does this mean that, in subsequent turns, Konetsu may choose to remain bowed because he used the ability when he had it, even though he no longer has the ability that allows him to choose to remain bowed?
Correct, because the "may remain bowed" is part of the action.
Hypothetically, if Konetsu instead had a trait that said he may remain bowed, and the action said "while he remains bowed XXX" but did not explicitly allow him to remain bowed, this would not work. But as the cards are worded it works fine.