Group 4 of the 71st Inter High School Mahjong Championships includes the second seeded Rinkai Girls' High School and the 12 schools that drew the 40–51 spots in the tournament.
First tournament round -- day 4
Winners of each first round match meet Rinkai, which has a bye in the first round.
Second tournament round -- day 6
Two winners of the second round match of Group 4 meet the two winners of Group 3 in one of two semi-final matches.
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