Yes, you are correct. Tsuyoshi's ability could also be used in response to non-ranged attack abilities targeting him at home, such as Intimidation, as long as the target of his ranged attack was in the current enemy army.
Shosuro Tsuyoshi (at home during battle) and No Hiding Place
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.