Motegi will continue to host the Japanese round of the MotoGP World Championship until at least 2018.
A contract extension has been agreed between Dorna Sports CEO Carmelo Ezpeleta and Mobilityland president Hiroshi Soda, whose company hosts and organises the event.
The Honda-owned facility has held a MotoGP round since 1999, initially in place of Suzuka, then alongside the famed circuit from 2000-2003.
Suzuka dropped away again following Dajiro Kato's death, with Motegi the lone Japanese event since 2004.
“It is our pleasure that the long-lasting presence of our grand prix at Twin Ring Motegi is now secured for another 5 years,” said Ezpeleta.
“Japan is where the prominent manufacturers of MotoGP such as Honda and Yamaha are based, and the grand prix at Twin Ring Motegi is one of the most important events in the Championship.
“We are committed to work closely with Twin Ring Motegi as MotoGP faces the time of innovative changes.”
Soda added: “We are pleased with the opportunity to continue organising MotoGP, unquestionably the highest category of motorcycle sports. The approach to send out the message put out by the power of Japan in the world of motorcycles is highly significant.
“The economic climate we are under today is never too favourable. Nevertheless, we are aspired to play our part to contribute to the powerful evolvement of motorcycle sport culture.
“We are grateful for the understanding of the importance of holding the MotoGP in Japan and for the strong support to procure the renewal of the contract that Dorna has given to us.”