Lotte Misho Nishikawa outfielder held contract renewal negotiations at ZOZO on April 10, and signed for an annual salary of 42 million yen (estimated amount), an increase of 26 million yen from this season. When interviewed, Nishikawa said, "I was surprised (laughs). When I saw the amount of money they offered me, I felt grateful to the team. （I am not satisfied with my performance this season, but I will do my best so that I can contribute to the team in a more mature way.

Nishikawa made his debut for Samurai Japan in a match against the European national team in March 2012 while a third-year student at Aoyama Gakuin University. He was drafted first that year, competing with two other teams before joining the Lotte Marines. He reached the required number of at-bats in his first year as a pro and posted a batting average of .281, sixth Pacific League. He was also selected for the November warm-up match against South Korea, making him a candidate for the WBC in March of next year. He plans to begin training early this offseason with an eye on the WBC. "After turning pro, I put on the Japan uniform and thought it looked cool. I felt a different kind of joy than I did in college. The WBC is a game I watched in college. So, I honestly want to play here, and with that in mind, I played in the warm-up matches with the intention of making a name for myself. I don't know if I'll be selected, but I'll keep my offseason focused on that goal, so I'll do my best," he said enthusiastically.

On November 18th, he announced that he had married a non-celebrity woman of the same age on June 2nd. The promising rookie of the year stated his big goal, saying, "My top priorities are to be selected as a member of the Best Nine and to win the Golden Glove award, but I would also like to win the batting hitter, which is a big title for hitter."