Extending their lead at every break, the Aussies were comprehensive in their victory as every player hit the scoreboard for the second consecutive game.
They struggled to convert from beyond the arc and were out-scored by nine from three-point range but more than made up for it on 51% shooting overall while holding Japan to 37% shooting from the field.
Relatively quiet through the first two games, Hunter Goodrick came alive on 7-9 shooting to tally a team-high 17 points and he was joined in double-digits by Samson Froling (15 points, four rebounds, two assists), Aiden Krause (12 points, seven boards, three assists, two steals) and Isaiah Lee (ten points).
Australia dominated the glass once again, earning second chance opportunities with 17 offensive rebounds and they won the overall count 45-21 with Kyle Bowen (eight points, eight boards) and Keli Leaupepe (four points, six rebounds) controlling proceedings from under the rim.
The box score for the game is available here.
Despite the victory, Australia remain in second spot in Group A behind Germany but both countries now have a two-game lead over third-placed Turkey.
That bodes well for their chances of reaching the Semi-Finals as the top two teams from each group have the opportunity to advance to the medal games on the last day of competition.
Australia have now earned a day's rest before their group stage games continue early Thursday morning in a top-of-the-table clash against host nation Germany.
Australia's Schedule for the 2018 Albert Schweitzer Tournament (all times AEST):
April 5: Australia vs. Germany at 4.00am
April 5: Australia vs. Turkey at 11.30pm
April 6: Semi-Finals and classification games
April 7: Medal Games and classification games