Jensen scored the go-ahead touchdown on a 1-yard sneak in the third quarter, and Ojuri had a 2-yard TD run on fourth-and-1 after the Bison (14-1) got the ball with a fourth-down stop.
The Bearkats (11-4) had a 40-yard touchdown run by Tim Flanders brought back by a holding penalty on the first possession of the second half, and Brian Bell's second interception on the next play led to Jensen's go-ahead score.
The Bison, who won 17-6 a year ago, improved to 10-1 in the FCS playoffs with their eighth straight postseason win.
Ojuri had 92 yards rushing, and Jensen added 44 to go with 115 passing yards.
John Crockett had 80 yards rushing, 24 receiving and a 26-yard pass to set up a score on a trick play after taking a straight-ahead handoff.
Bell threw for 255 yards against the nation's best pass defense, but had three of Sam Houston's four interceptions. Flanders, the school's career rushing leader, was held to 53 yards on 19 carries, a 2.8 average.
It was tied at 10 when Flanders broke loose on an apparent touchdown on the first possession of the second half. Instead, Sam Houston had a third long run deep into Bison territory wiped out by a holding penalty. None of the drives ended in points.
After the holding call on Flanders' run, Carlton Littlejohn intercepted Bell's pass while falling to his knees, and the turnover was upheld on review. Ojuri had 25 yards rushing on a drive that ended with Jensen's score for a 17-10 lead.
The Bearkats were driving again when Bell had to throw the ball away before getting slammed to the turf on fourth-and-1. He stayed flat on his back and sat out parts of the fourth quarter.
Jensen's 31-yard pass to Zach Vraa set up Ojuri's fourth-down run, and the Bison further deflated the Bearkats when they turned a botched snap on the extra point into a 2-point conversion and a 25-10 lead on a desperation pass from kicker Adam Keller to Mike Hardie.
North Dakota State scored the first touchdown in the second quarter by covering 65 yards on three running plays. Jensen ran 21 yards on third down after the field opened when Sam Houston State's leading tackler, Darnell Taylor, crumpled to the ground in front of him with an apparently leg injury. Ryan Smith ran 24 yards, and Jensen, who accounted for both touchdowns in last year's game, scored from the 20.
The 72-yard drive came after Marcus Williams set a North Dakota State record with his 17th career interception. Williams later added his 18th.
Sam Houston State ended a championship game touchdown drought just before it reached six quarters and tied the score at 10 when Bell threw a 1-yard pass to K.J. Williams with 33 seconds left in the first half. A 30-yard toss to Richard Sincere put the ball on the 1 three plays after an interception by Andre Martin Jr. was wiped out when he was called for defensive holding.
Crockett's career-long 57-yard run set up a 32-yard field goal by Keller to give North Dakota State a first-quarter lead. Miguel Antonio kicked a tying 38-yarder in the second quarter after missing from 32 yards in the first.