"It went well last year and got even better this year.
"It shows we're playing the right music."
Johnston said his show was "very music based".
"I'm playing a lot of music every hour. It's about having the right music but also having the right balance of some really cool local stuff that's interesting, fun and a bit gossipy."
Music was "obviously important" in attracting listeners to the show, but Johnston said the popularity of morning show hosts Polly and Grant also contributed to listeners throughout the day.
Another factor was community presence.
Johnston said his job was 50 per cent doing a radio show and 50 per cent doing "fun stuff" in the community.
Brian Kelly on Coast was awarded the number one breakfast show in Tauranga, a title he has held for over 30 years.
The Hits was rated number one in audience numbers for main grocery shoppers with kids, following a 30 per cent growth in the market.
ZM content made it the number one station for 18-34 year olds in Tauranga.