Shintaro Fujinami (藤浪 晋太郎, Fujinami Shintarō; born April 12, 1994) is a Japanese professional baseball pitcher for the Yokohama DeNA BayStars of Nippon Professional Baseball (NPB). He has previously played in Major League Baseball (MLB) for the Oakland Athletics and Baltimore Orioles, and in NPB for the Hanshin Tigers.

Fujinami started playing Little League Baseball for the Takeshirodai Club, then played for the Osaka Senboku Boys upon entering Miyayamadai Junior High [ja], where he pitched as fast as 142 km/h (88 mph). He also pitched for the national team in the under-16 world championship in 2009. He graduated grade school at 180 cm (5 ft 11 in), and junior high at 194 cm (6 ft 4+1⁄2 in).

In 2010, Fujinami entered Osaka Toin High School. In his final year in 2012 he led Tōin as their ace pitcher at the Japanese High School Baseball Invitational Tournament and Japanese High School Baseball Championship, where the school won both competitions. During the Summer Koshien tournaments, he pitched two consecutive complete shutout games in both the semi-finals and finals (only surrendering two hits in each game), recorded the fastest pitch of 153 km/h (95 mph) and tied the tournament record for the most strike-outs in the finals match (14). He finished the tournament with a 1.07 ERA in 76 innings, and 90 strikeouts. In the fall, he again pitched for the national team in the 2012 18U Baseball World Championship, where he recorded a 1.11 ERA. He led the tournament with 24+1⁄3 innings pitched and 26 strikeouts, while issuing 8 walks, and was selected into the tournament's Best Nine. In addition, he received the 2012 MVP Award by the International Baseball Federation for the 18 and under category.

Fujinami was the number 1 pick of the Tigers, Buffaloes, Marines, and the Swallows in the 2012 Nippon Professional Baseball draft. Hanshin won the four-way lottery and assigned him jersey number 19.

Fujinami made his NPB debut on March 31, 2013, the third game of the season and the earliest-ever appearance by a rookie drafted out of high school. He earned the loss, pitching six innings and allowing both runs in a 2–0 loss against the Tokyo Yakult Swallows. He struck out Akinori Iwamura in the bottom of the first inning for his first NPB strikeout.

Fujinami was due to make his second start on April 7 against the Hiroshima Toyo Carp but was replaced by Minoru Iwata, who was unable to pitch in the rained-out game the day before. Instead, he made his next appearance as a relief pitcher. He made his second start on April 14 against the Yokohama DeNA BayStars and recorded his first professional win, pitching six scoreless innings. Fujinami was the fifth pitcher drafted out of high school in NPB history to record his first pro victory the year after they won a Koshien tournament and the first in that group to also record their first pro victory at Koshien Stadium. He is also the first pitcher out of high school in franchise history to record their first pro victory at Koshien and the first Central League rookie out of high school to record ten or more victories in a season since Yutaka Enatsu in 1967.

Fujinami quickly gained popularity and was the third-highest vote getter amongst Central League starting pitchers for the 2013 NPB All-Star Series, trailing Kenta Maeda and Yasuhiro Ogawa. He started the second game of the All-Star series and pitched two scoreless innings. In the top of the sixth inning, he played a prank on Nippon Ham's Sho Nakata, a former senior at Osaka Tōin, by throwing 2 very slow balls over his head, which prompted Nakata to throw his bat and jokingly take a few steps toward the mound. Fujinami ended up striking out Nakata.

He finished his rookie year at 10–6, with 125 strikeouts and a 2.75 ERA in 23 starts.