The Tasmanian has not raced since his horrific high-speed smash on the descent of the Mont du Chat ended his 2017 Tour de France on stage 9, and effectively his season.
Preferring to take his recovery from a fractured pelvis and collarbone slowly, Porte is still eager to end his season in Japan.
"I'm really looking forward to racing at the Japan Cup Cycle Road Race this year," he said. "Not only is it a chance for me to get another race day in the legs before the end of the season, but it's also my first opportunity to race at the Japan Cup Cycle Road Race since 2013."
"The Japanese fans are really incredible so it's always a great atmosphere at the race. I can definitely say it's one of my favorite races."
"Given I haven't raced since July, I'm not going in with any expectations. I'm just happy to be racing again this year before my focus turns to the 2018 season."
BMC director Fabio Baldato is also looking forward to Porte lining up with BMC team mates Martin Elmiger, Michael Schär, Bram Welten and Danilo Wyss in Japan.
"We are really happy to see Richie Porte back at the start line for the first time since his Tour de France crash," he said. "Although we are lining up at the last race of the season, the Japan Cup Cycle Road Race will be a good chance for Richie to get back into the racing rhythm before he starts a solid off season."
The 2017 Tour Down Under and Tour de Romandie winner also sneaked home for some relaxing training before heading to Japan: