Japan saw off Iraq on Tuesday with a 2-0 win.
Also, Indonesia survived a late Vietnamese revival to defeat their Southeast Asian rivals 7-5.
Japan will face the winners of the Islamic Republic of Iran or Lebanon in Thursday's semi-finals.
Iran is scheduled to meet Lebanon Tuesday night at the Pour Sharifi Indoor Stadium in Tabriz, Iran.
The 2019 AFC U-20 Championship is the second edition of AFC U-20 Futsal Championship, the biennial international futsal championship organized by the Asian
Football Confederation (AFC) for the men's youth national futsal teams of Asia.
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