"Of course we are happy to get the win and every win at this level is important," he said.
"I don't think we showed everything we can do and hopefully next weekend we can actually unleash what we know we are capable of.
"It took us until the second half to show a little bit of what we can do and it took us the first half to get into the game and get used to the heat and the pace.
"We have got a good group of young special players here and I'm really excited to show what we can do."
Robinson, who made his try scoring debut against the Barbarians last summer, made it two from two in the international game, scoring his side's only try in Osaka.
"It was a great feeling to score," he added.
"To start an international, to sing the anthem and score a try - they are all unique emotions and it's the best feeling in the world. I haven't felt that happy since the last time I scored for Wales.
"It was Liam (Williams') skill, the reverse, out of the back door pass and Owen (Williams') unselfishness that set it up.
"We play as a team and not as individuals and Owen highlighted that.