2002 in Japanese baseball
 Nippon Professional Baseball
- Bold indicates league champion; Italics indicate Nippon Series winner
 Central League
 Pacific League
- Bold indicates league record, Italics indicate all-time record
 All-Star Game
The NPB All-Star Game featured two games and was a tie one games to one. The first game was played at Tokyo Dome and was won by the CL, 4 - 1. The second game was played at Matsuyama Central Park Baseball Field and was won by the PL, 4 - 2.
In the Nippon Series, the Yomiuri Giants (CL) defeated the Seibu Lions (PL), 4 games to 0. The winning manager was Tatsunori Hara and the series MVP was Tomohiro Nioka.
 Award Winners
The winner of the 2002 Sawamura Award was Koji Uehara of the Yomiuri Giants. He had a 17 - 5 win-loss record, 182 strikeouts, and a 2.60 ERA in 204.0 innings.
 Best Nine
The following players were part of the 2002 Best Nine teams.
 Gold Gloves
The following players were the recipients of the Gold Glove Award in 2002.
 High School Baseball
The 84th National High School Baseball Championship featured a total of 4163 schools competing for 49 spots in the finals at Koshien. In the championship game Meitoku Gijuku High School (Kochi) defeated Chiben Wakayama High School (Wakayama) by a score of 7 - 2.
The 74th National High School Baseball Invitational Tournament featured 32 schools competing in the tournament at Koshien. In the championship game Houtoku Gakuen High School (Hyogo) defeated Naruto Kogyo High School (Tokushima) by a score of 8 - 2.
 University Baseball
 All-Japan University Baseball Championship Series
The 2002 All-Japan University Baseball Championship Series featured 26 schools competing in the tournament at Meiji-Jingu Stadium. In the championship game Asia University defeated Waseda University by a score of 2 - 1.
 Meiji Jingu Baseball Convention
In the Meiji Jingu Baseball Convention Asia University defeated Tohoku Fukushi University.
 Tokyo Big6 Baseball League
 Tohto University Base Ball League
 Kansai 6 University Baseball League
 International Baseball
The Major League All-Stars toured Japan in the fall of 2002. The touring team went 4 - 4 - 0 against Japanese competition.
In the first World University Baseball Championship in Italy, the Japanese national baseball team won a bronze medal. At the twenty-first Haarlemse Honkbalweek in Haarlem, the Netherlands, the Japanese national baseball team placed fifth. In the fifteenth Intercontinental Cup in Cuba, the Japanese national baseball team placed fifth.
 Japanese Players in Other Countries
- Italics indicate a Major League appearance
- Craig House: Jacksonville Suns, Southern (LAD-AA); Las Vegas 51s, Pacific Coast (LAD-AAA)
- Nobutoshi Ido: AZL White Sox, Arizona (CHW-R)
- Hideki Irabu: Texas Rangers
- Masahito Kohiyama: China Trust Whales, Chinese Professional Baseball League
- Satoru Komiyama: Norfolk Tides, International (NYM-AAA); New York Mets
- Ryo Kumagai: Augusta Greenjackets, South Atlantic (BOS-A); Sarasota Red Sox, Florida State (BOS-A-Adv)
- Katsuhiro Maeda: Sinon Bulls, Chinese Professional Baseball League
- Keith McDonald: Memphis Redbirds, Pacific Coast (STL-AAA)
- Yasumichi Minami: GCL Red Sox, Gulf Coast (BOS-R)
- Eiji Miyamoto: Jackson Senators, Central Baseball League
- Hideki Nagasaka: Solano Steelheads, Western League; Cook County Cheetahs, Pioneer League
- Shin Nakagomi: Brother Elephants, Chinese Professional Baseball League
- Micheal Nakamura: Edmonton Trappers, Pacific Coast (MIN-AAA)
- Yuji Nerei: Jackson Senators, Central Baseball League; Puebla Parrots, Mexican League (AAA)
- Takahito Nomura: Milwaukee Brewers; Indianapolis Indians, International (MIL-AAA)
- Yoshiyuki Ohtsuka: Williamsport Crosscutters, New York-Penn (PIT-SS); GCL Pirates, Gulf Coast (PIT-R)
- Stephen Randolph: Tucson Sidewinders, Pacific Coast (ARI-AAA)
- Dave Roberts: Los Angeles Dodgers
- GG Sato: GCL Phillies, Gulf Coast (PHI-R); Batavia Muckdogs, New York-Penn (PHI-SS)
- Tsuyoshi Shinjo: Fresno Grizzlies, Pacific Coast (SFG-AAA); San Francisco Giants
- Mac Suzuki: Wichita Wranglers, Texas (KCR-AA); Omaha Royals, Pacific Coast (KCR-AAA); Kansas City Royals
- Ichiro Suzuki: Seattle Mariners
- So Taguchi: New Haven Ravens, Eastern (STL-AA); St. Louis Cardinals
- Yusuke Taki: GCL Marlins, Gulf Coast (FLA-R)
- Koichi Taniguchi: Jackson Senators, Central Baseball League
- Tetsuya Yamaguchi: Missoula Osprey, Pioneer (ARI-R)
- Nobuaki Yoshida: Fort Wayne Wizards, Midwest (SDP-A)
- Masato Yoshii: Montreal Expos
 Hall of Fame
The following people were elected to the Japanese Baseball Hall of Fame: