Japan ended Australia's 100 per cent record in the men's competition, as group play concluded at the International Wheelchair Basketball Federation Asia Oceania Championships in Pattaya.
They recorded a 64-61 victory at the Thai city's Eastern National Sports Centre to finish on top of the Division A standings.
All six Division A teams were guaranteed a place in tomorrow's quarter-finals, regardless of their group stage performance.
Both Japan and Australia ended on four wins and one defeat, with the Oceania side finishing second.
Iran saw off South Korea 75-63 today to finish third, as the Koreans came fourth.
Hosts Thailand and China were not in action today, ending in fifth and sixth, respectively.
Saudi Arabia and Malaysia advanced from Division B yesterday to complete the quarter-final line-up with the Division A sides.
Malaysia beat the Saudis 64-44 today in a match which determined where each side enters the last eight.
The quarter-finals have Tokyo 2020 places riding on them, as the top-four countries from the event who are not Japan will qualify for next year's Paralympic Games.
Japan, who get an automatic berth at Tokyo 2020 as hosts, will meet Saudi Arabia, with Australia taking on Malaysia.
Iran will play China, while South Korea take on Thailand.
In the women's event there was joy for Thailand, as they won Division B on the penultimate day of group action to reach the semi-finals.
They defeated Cambodia 28-17 to end with a 100 per cent record in the five-team group and join three Division A countries in the last four.
Division A's double round-robin continued with a 52-37 win for China over winless Japan, leaving the Chinese on top with three wins from three.
In Division B, Iran beat Afghanistan 41-35 to register a third win but the Thai success means they are out of contention.
Women's group stage play will conclude tomorrow.
Three Tokyo 2020 spots are available from their tournament.