A 4-0 victory over Tottenham, which saw them break Manchester United's Premier League record by scoring four or more in a game for the 11th time in a season, took Brendan Rodgers' side back to the summit for the first time since Christmas.
Liverpool have now won eight league games in a row and, with title rivals Manchester City and Chelsea still to visit Anfield, victories in their six remaining games would make certain of glory.
"Any team who is top of the league at this stage deserves to be there," Johnson said.
"This is a difficult league with a lot of tough games but I think we can stay there.
"This is a fantastic club. Everyone involved here loves it and wants to win the league badly. We want to get the club back where it should be.
"But being top now is only significant if we stay there. Forget the league table, just win at Upton Park (against West Ham on Sunday).
"Playing in the best league in the world, the hardest thing is to go game by game.
"Every day you've got your mates texting you and you see on the news how close you are. But everyone here is professional. Every time we come here we have a job to do.
"I'm sure everyone is looking forward to those big home games against Manchester City and Chelsea but we have to take care of West Ham first otherwise those games might not be as relevant.
"We have to make sure we win our next game. We all know what's expected of us and we're all confident."
Liverpool received an unexpected double boost before they had even kicked off against Spurs when leaders Chelsea lost at Crystal Palace and City were held to a draw by Arsenal.
That only heightened the sense of anticipation at Anfield on Sunday but nerves were eased just two minutes in when Younes Kaboul unwittingly helped the ball into his own net.
"Scoring after 100 seconds was just the perfect start to the game for us," Johnson added. "We put them under pressure and they could barely keep hold of the ball.
"There wasn't really any extra incentive with Chelsea and City dropping points. We know we need to try to win every game.
"Of course when others drop points it's helpful but we just need to be worrying about ourselves at the moment. I thought everyone was fantastic. It was a real team effort."