Facing Japan's own Kurumi Nara, a first-time WTA semifinalist, there were some close moments early on - the two traded breaks and found themselves even at 2-all - but the No.5-seeded Bouchard came alive, winning the next seven games in a row to build a 62 30 lead, and she would close it out, 62 62.
"She played really well, she was changing the direction of the ball a lot, and I wasn't sure where the ball was going a lot of the time," Bouchard said. "But I just tried to do the same back to her and step into the court as much as I could during the match, and when I was doing that I was more successful."
Now the 19-year-old Canadian - the No.1 teenager in the world - is into her first WTA final.
"I'm really excited - this is what I play for, this is what I work hard for," Bouchard said. "I'm really looking forward to it, looking forward to a big crowd tomorrow, and I really want to enjoy my first WTA final."
Awaiting Bouchard in the final will be No.3 seed Samantha Stosur, who won her semifinal match earlier in the day. Bouchard beat Stosur in their only previous meeting, though it did come via retirement.
"I played Eugenie one time but I had to pull out injured during the match," Stosur said. "It was an injury from Indian Wells, a pulled calf muscle. So I wasn't really ready to play in Charleston, and I wasn't really paying much attention in that match, so I'm going to have to do a bit of homework tonight."
"First of all I played her in Charleston, which is clay so that's very different, and she retired in the second set too," Bouchard said. "I'm not really going to think about that match. This is a new match.
"She's a great player, she won a Slam, and she's obviously playing great tennis here in Osaka."
Nara was playing her first WTA semifinal. She had never even been to a WTA quarterfinal beforehand.