Speaking after the match, Readings said the team settled better into their own identity in the second half, showing exactly what the team is capable of against the world's best sides.
"I think what the first half showed is that we haven't been together for a while and we found it hard to keep possession and we also found it hard to stop them switching play," Readings said.
"It was one of those halves when we just had to dig in and against Japan you've got to expect that. Even the best teams in the world have to do that for periods against Japan."
"From a defensive point of view in the first half we sat back a bit too much and Japan penned us back in our own half and that's not what the Football Ferns are about."
After conceding late in the first period, halftime offered the team the chance to regroup and reconnect to their philosophy.
"The overall message was quite basic, we asked the team to step higher up the pitch and get closer to their players to put more pressure on.
"In possession the message was to be a lot more patient with our play and shift the ball quicker across the back and using the fullbacks and getting them on the ball a lot more.
That message produced tangible results in the 62 minute when the Football Ferns neatly played their way through some intense Japanese pressure deep in their own half, moving the ball to edge of the penalty area where Yallop applied a clinical finishing touch with a superbly struck drive.
The nature of the equaliser highlighted the way forward the New Zealand side with Readings' disappointment over the result tempered by the levels the team reached in the second period.
"We wouldn't have been happy to draw after the second half performance so we're certainly disappointed to lose the game.
"But we can take definitely take encouragement from the fact that we've outplayed one of the best teams in the world at keeping the ball."
Japan 2 (Takase Megumi 38', Yuika Sugasawa 86')
New Zealand 1 (Kirsty Yallop 62')
Halftime: 1-0