Shohei Otani and Hiromi Oka each homered in a four-run second inning as the Hokkaido Nippon Ham Fighters held on to beat the Chiba Lotte Marines 4-3 on Wednesday.

Before 14,244 on a rainy afternoon at QVC Marine Field, Otani hit a solo shot off Takahiro Fujioka to open the second and Oka capped the inning with his first career home run, a three-run shot.

The Fighters improved to 3-2 on the young season.

Oka, the team’s third-round draft pick in 2013, suffered a leg fracture last May that limited his debut season to just 15 games. In the starting lineup for the first time this year, Oka made his mark with two outs and two on.

“I just wanted to make as good a swing as I could,” said the 24-year-old Oka, who fouled off a pair of two-strike deliveries before pulling a high breaking ball from Fujioka down the left-field line.

“I didn’t do anything last year, so there’s nothing for me to do but play hard. I need to accomplish so much more than this.”

After a scoreless first in which the Fighters failed to punish some fat pitches from Fujioka, the visitors made amends in the second. Otani, the Fighters’ designated hitter between starts as the club’s ace pitcher, blasted a high 3-2 fastball over the fence in center.

The Marines rallied against former Pacific League MVP Mitsuo Yoshikawa, scoring once in the fifth and twice in the sixth, when they narrowly missed a bigger inning.

With runners on first and second, Toshiaki Imae tried to get out of the way on a double steal attempt, but obstructed catcher Kensuke Kondo’s throw and was called out for interference. Tadahito Iguchi rescued the inning with a two-out, two-run double to make it a 4-3 game and drive Yoshikawa (1-0) from the mound.

Yoshikawa, who gave up six hits and a walk over 5⅔ innings, got the win after four Fighters relievers kept the Marines off the board the rest of the way. Hirotoshi Masui earned his second save.

Fujioka (0-1) allowed four hits and two walks, while striking out six in his five-inning stint.

Buffaloes 10, Hawks 7

At Fukuoka’s Yafuoku Dome, Hiroyuki Nakajima homered and drew a bases-loaded walk during an eight-run sixth inning as Orix overturned a three-run deficit to beat Softbank and snap a four-game season-opening losing streak.

Lions at Eagles — ppd.

CENTRAL LEAGUE

Tigers 2, Swallows 1

At Jingu Stadium, Hanshin right-hander Akira Iwamoto (1-0) held Tokyo Yakult to one run on a sacrifice fly over seven innings to win for the first time in three years.

BayStars 7, Carp 4

At Yokohama Stadium, Guillermo Moscoso (1-0) allowed a run on four hits in seven innings as Yokohama beat Hiroshima for the second straight night and moved over .500 for the first time in two seasons.

Dragons 9, Giants 0

At Nagoya Dome, Chunichi ace Kazuki Yoshimi (1-0), back from having Tommy John surgery in 2013, allowed two hits over six innings to win for the first time in three years.