"We want to give them back this confidence and show them this is something very special to us.
"We want to carry on and qualify and show the people in Japan that we can play marvellous football."
A nation staging the World Cup has never failed to reach the second stage.
Co-hosts South Korea's win last Tuesday mounted more expectation on Japan's players.
"We had a lot of pressure on our shoulders and tonight we saw a brilliant Japanese side playing," said Troussier.
"They played together as a team and did a great job. I am very proud of being coach of this team.
"Everybody brought something important to the match and the whole performance would give them more confidence."
Japan's final Group H game is against Tunisia on Friday and Troussier believes his side are capable of qualifying for the second stage for the first time.
But he and goalscorer Inamoto did stress the need for caution.
Inamoto said: "The important thing is not to get carried away, to win the next game and advance to the next round in first place.
"I want to concentrate on the next game."