Three-time Olympic gold medallists United States and world champions Poland qualified for Tokyo 2020 by topping their respective pools in the International Volleyball Federation (FIVB) Men's International Olympic Qualification Tournament.
Brazil, Russia, Italy and Argentina also reached the Olympics by winning their respective groups this weekend.
At Rotterdam Ahoy, the US sealed their place in Tokyo with a 25-18, 25-20, 17-25, 25-21 win against hosts The Netherlands as they won a third successive Pool B match.
Belgium finished third in the pool after a 27-25, 25-21, 25-16 win against South Korea.
Poland overcame a scare at the Ergo Arena in Gdańsk to ensure Olympic qualification.
Against Slovenia they lost the first set but fought back for a 21-25, 25-23, 25-23, 25-21 victory to win Pool D.
France finished second in the pool by defeating Tunisia 25-21, 20-25, 25-19, 25-22.
Argentina booked their place at Tokyo 2020 with a thrilling five-set victory against Pool F hosts China.
At Beilun Sports and Arts Centre in Ningbo, the two sides knew the winners would secure a coveted ticket for the Olympics and served up a treat.
A topsy-turvy battle was won by Argentina 19-25, 25-22, 25-21, 18-25, 15-9.
China finished third in the pool as Canada recorded a 25-16, 26-24, 25-20 win against Finland to climb into second place.
Brazil will have the chance to defend their Olympic title in Tokyo after saving match point in a five-set thriller against Bulgaria.
In Pool A they were on the verge of defeat at the Palace of Culture and Sports in Varna before fighting back to win 23-25, 19-25, 32-30, 25-16 15-11.
Egypt finished third in the pool with a straight sets 25-17, 31-29, 25-17 victory against Puerto Rico.
In Pool E hosts and European champions Russia defeated Iran to secure their Olympic ticket at Sibur Arena in Saint Petersburg.
They headed into the match one point clear of Iran but eased to a 25-19, 25-23, 25-23 win.
Cuba won 25-18, 25-23, 25-22 against Mexico to finish third in the pool.
Hosts Japan have automatic qualification for the Olympic tournament while the remaining places will be contested through The Continental Olympic Qualifying Tournaments, with dates and locations still to be confirmed.
Italy won the final ticket on offer at the Palaflorio in Bari by defeating rivals Serbia 25-16, 25-19, 25-19 to win Pool C.
Australia sealed third place by defeating Cameroon 25-17, 25-16, 25-18.