Johnson angled his mount off the back of Rock On Wood at the 200m and she responded with a sustained burst that carried her to the finish line in front by a head from Rock On Wood with Shadows Cast and Secret Allure close up behind the pair.
Johnson was his usual understated self as he described the way the race had panned out for him.
"I got back past midfield but got out at the right time," he said.
"She came into it nicely and I ended up behind the right horse turning in.
"She found enough to hold him off.
"She's honest and you just have to look at her record as she hasn't missed many times.
"She was trained to the minute and although we had a bit of trouble getting up here, she seemed to cope with it."
Along with her thirteen victories, Kiwi Ida has also been placed on 14 occasions, with six of those in black type company, and has earned just under $393,000 in prizemoney.
- NZ Racing Desk