Hosts Japan were among the successful teams today in Sweden ©World Curling

Japan, Czech Republic, Russia and United States each sealed playoff places on the final day of round-robin action at the World Mixed Doubles Curling Championship 2018 in Östersund today.

Japan required an extra-end before beating Finland 6-5 in thrilling circumstances at the Östersund Arena.

In the eighth end, Japan held their opponents to a single point to force the extra-end before they executed a draw to the four-foot for the single point to win the match. 

Russia also qualified as a result despite not playing.

“It’s definitely a big part of the game plan [being positive]," said Japanese coach, J.D. Lind.

"Especially in mixed doubles, just with one bad shot you can have a bad end. 

"You just have to stay positive and focus on the next one. 

"That’s what happened today."

Czech Republic and United States had each guaranteed their progression after respective wins earlier in the day.

Sweden also continued their imperious form on home ice ©WCF/Richard Gray
Sweden also continued their imperious form on home ice ©WCF/Richard Gray

Czech Republic defeated Guyana 10-1 in just six ends in Group E, scoring in all but one of the ends played. 

The US were locked 7-7 with Australia after eight ends.

Australia came up short with their final shot to allow the Americans a one point steal and, consequently, a place in the playoffs.

South Korea had already qualified but completed a perfect round-robin phase with a seventh successive win over previously unbeaten Canada, 8-5, elsewhere today.

Hosts Sweden also ended their qualifying phase in ominous form with an 11-0 shutout of Hong Kong.

Estonia also remained unbeaten with a 10-5 win over Lithuania, helped by six points in a sixth end power-play.

Playoff matches are due to begin tomorrow.