| Tuesday, December 30th , 1958 | Signed free agent RF Masaki Murakami to a minor league contract. | Sunday, December 28th , 1958 | Signed free agent RP Botan Kawamoto to a minor league contract. | Friday, December 26th , 1958 | Signed free agent RF Masaki Murakami to a minor league contract. | Tuesday, December 23rd , 1958 | Signed free agent RP Shiro Sawada to a 1-year contract worth a total of $4,440. | Released RP Shiro Sawada. | Friday, December 19th , 1958 | Signed free agent RP Teppei Kaneko to a minor league contract. | Monday, December 15th , 1958 | Signed free agent RP Eisei Sato to a 1-year contract worth a total of $4,560. | Released RP Eisei Sato. | Tuesday, December 9th , 1958 | Signed free agent RP Nikki Uesugi to a minor league contract. | Wednesday, December 3rd , 1958 | Signed free agent SP Fujio Kanazawa to a minor league contract. | Saturday, November 29th , 1958 | Signed free agent SP Fujio Kanazawa to a minor league contract. | Sunday, November 23rd , 1958 | Signed free agent RP Kikunojo Sakoda to a minor league contract. | Thursday, November 20th , 1958 | Signed free agent RP Kinichi Ota to a 1-year contract worth a total of $4,640. | Released RP Teruo Ono. | Monday, November 17th , 1958 | Signed free agent RF Masaki Murakami to a minor league contract. | Signed free agent SP Fujio Kanazawa to a minor league contract. | Signed free agent RP Teppei Kaneko to a minor league contract. | Thursday, November 13th , 1958 | Signed free agent RP Botan Kawamoto to a minor league contract. | Wednesday, November 12th , 1958 | Signed free agent RP Benkei Nakao to a 1-year contract worth a total of $4,020. | Released RP Benkei Nakao. | Monday, November 10th , 1958 | Signed free agent LF Shinpei Abe to a minor league contract. | Signed free agent RP Shonosuke Yamaguchi to a minor league contract. | Wednesday, November 5th , 1958 | Signed free agent CF Totaro Nakashima to a minor league contract. | Tuesday, November 4th , 1958 | Signed free agent RP Munehiro Toyama to a 1-year contract worth a total of $4,680. | Released RP Eisei Sato. | Saturday, November 1st , 1958 | Signed free agent RP Teruo Ono to a 1-year contract worth a total of $4,520. | Released RP Fujimaro Taira. | Signed free agent SP Kazumi Yoshida to a minor league contract. | Monday, October 27th , 1958 | Signed free agent RF Masaki Murakami to a minor league contract. | Monday, October 13th , 1958 | RP Kyouichi Mizutani retired from professional baseball. | Signed 1B Coach Hal Spain to a 2-year contract extension. | Signed 3B Coach Frank Cook to a 2-year contract extension. | Signed Hitting Coach Tim DeCola to a 1-year contract extension. | Signed Manager Shun Kawamura to a 2-year contract extension. | Signed free agent 2B Suzu Fujino to a minor league contract. | Signed free agent RP Fujimaro Taira to a minor league contract. | Sunday, October 5th , 1958 | Signed free agent SP Kijuro Shimizu to a minor league contract with a major league option. | Released RP Zaijiro Terada. | Friday, October 3rd , 1958 | Signed free agent 2B Suzu Fujino to a minor league contract. | Monday, September 29th , 1958 | Signed free agent RP Ryouta Takahashi to a minor league contract. | Signed free agent RP Nobuo Yamane to a minor league contract. | Thursday, September 25th , 1958 | Signed free agent SP Shigeharu Matsushima to a minor league contract. | Saturday, September 20th , 1958 | Signed free agent RF Kaiji Araki to a minor league contract. | Released RF Kaiji Araki. | Friday, September 12th , 1958 | Signed free agent LF Yoshisato Sasaki to a minor league contract. | Saturday, August 30th , 1958 | Signed free agent RP Nobuo Yamane to a minor league contract. | Signed free agent RP Fujimaro Taira to a minor league contract. | Thursday, August 28th , 1958 | Signed free agent 2B Suzu Fujino to a minor league contract. | Released 2B Suzu Fujino. | Friday, August 22nd , 1958 | Signed free agent 2B Suzu Fujino to a minor league contract. | Released 2B Suzu Fujino. | Friday, August 1st , 1958 | Signed free agent SP Keisei Doi to a minor league contract. | Thursday, July 17th , 1958 | Signed free agent CL Maris Kaneko to a minor league contract with a major league option. | Released CL Maris Kaneko. | Sunday, July 13th , 1958 | Signed free agent CL Senichi Soga to a minor league contract. | Signed free agent SP Mitsuhisa Okamoto to a minor league contract. | Saturday, July 12th , 1958 | Placed RF Masaki Yamaguchi on the 14-day injured list, retroactive to 07/11/1958. | Thursday, July 10th , 1958 | Signed free agent RF Kaiji Araki to a minor league contract. | Released RF Kaiji Araki. | Thursday, July 3rd , 1958 | Placed RP Zaijiro Terada on the 14-day injured list, retroactive to 07/02/1958. | Wednesday, June 18th , 1958 | Signed free agent RF Kaiji Araki to a minor league contract. | Released RF Kaiji Araki. | Tuesday, June 10th , 1958 | Signed free agent C Yorihiko Kawata to a minor league contract. | Thursday, June 5th , 1958 | Drafted CF Toshimasa Ikeda in the 1958 first-year player draft (Round 1, Pick 4, 4th overall pick). | Drafted 2B Toichi Smith in the 1958 first-year player draft (Round 2, Pick 4, 16th overall pick). | Drafted 1B Naruhiko Smith in the 1958 first-year player draft (Round 3, Pick 4, 28th overall pick). | Drafted RP Kozo Miyaji in the 1958 first-year player draft (Round 4, Pick 4, 40th overall pick). | Drafted 1B Kazutoshi Sakamoto in the 1958 first-year player draft (Round 5, Pick 4, 52nd overall pick). | Saturday, May 31st , 1958 | SP Otoya Maehara did not elect for free agency and will remain in the Hosho organization. | Tuesday, April 29th , 1958 | Signed free agent SP Goro Nagata to a minor league contract. | Wednesday, April 23rd , 1958 | Signed free agent SP Toru Inoue to a minor league contract. | Tuesday, April 8th , 1958 | Signed free agent SP Jomei Yamada to a 1-year contract worth a total of $4,520. | Released SP Jomei Yamada. | Wednesday, April 2nd , 1958 | Signed free agent RP Michiya Sasaki to a 1-year contract worth a total of $4,440. | Released RP Michiya Sasaki. | Signed free agent SP Yo Takemoto to a minor league contract. | Thursday, March 27th , 1958 | Signed free agent SP Goro Nagata to a minor league contract. | Monday, March 24th , 1958 | Signed free agent CL Michito Yanagi to a minor league contract. | Wednesday, March 19th , 1958 | Signed free agent SP Goro Nagata to a minor league contract. | Signed free agent RP Manabu Shiotani to a minor league contract. | Thursday, March 13th , 1958 | Signed free agent RP Jomei Yamada to a 1-year contract worth a total of $4,800. | Released RP Jomei Yamada. | Thursday, March 6th , 1958 | Signed free agent RF Ssekien Ikeda to a minor league contract. | Wednesday, March 5th , 1958 | Released SP Toru Inoue. | Tuesday, March 4th , 1958 | Released SS Harumi Kawai. | Signed free agent SP Toru Inoue to a minor league contract. | Monday, March 3rd , 1958 | Signed free agent SS Harumi Kawai to a minor league contract. | Thursday, February 27th , 1958 | Released SP Goro Nagata. | Wednesday, February 26th , 1958 | Signed free agent SP Goro Nagata to a minor league contract. | Monday, February 24th , 1958 | Signed free agent RP Kikunojo Sakoda to a minor league contract. | Friday, February 21st , 1958 | Signed free agent SP Toru Inoue to a minor league contract. | Sunday, February 16th , 1958 | Signed free agent RP Hiroo Tamura to a 1-year contract worth a total of $3,600. | Released RP Hiroo Tamura. | Thursday, February 13th , 1958 | Signed free agent SP Goro Nagata to a minor league contract. | Tuesday, February 4th , 1958 | Signed free agent RP Jomei Yamada to a 1-year contract worth a total of $4,740. | Released RP Jomei Yamada. | Tuesday, January 28th , 1958 | Signed free agent RP Nobuo Yamane to a minor league contract with a major league option. | Released RP Nobuo Yamane. | Signed free agent SP Takeshi Miyazaki to a minor league contract. | Saturday, January 25th , 1958 | Signed free agent RP Hiroo Tamura to a 1-year contract worth a total of $3,540. | Released RP Hiroo Tamura. | Monday, January 20th , 1958 | Signed free agent RP Naotake Fukushima to a minor league contract. | Thursday, January 16th , 1958 | Released LF Kenta Abe. | Wednesday, January 15th , 1958 | Signed free agent SP Yo Takemoto to a minor league contract. | Wednesday, January 1st , 1958 | Signed free agent SP Tetsuya Ishibashi to a minor league contract. | | |