On August 31, midway through the 1937 fall season, the team changed its name to the Lion Baseball Club when it was acquired by Komajiro Tamura, with sponsorship by Lion Toothpaste. Late in the 1940 season, the Japan Baseball League outlawed English nicknames. Owner Tamura refused to change the team's name, insisting that "Lion" is Japanese The team completed the season as Lion, finishing in last place, 50 games behindTokyo Kyojin.
Asahi
In 1941 the team moved from Tokyo to Osaka and acquiring new sponsorship from Asahi Shimbun; from 1941–1944 it was called the Asahi Baseball Club, and in 1943 had its first winning season, finishing at 41-36-7.
Pacific
After the resumption of the Japanese Baseball League in 1946, the team changed its name to Pacific Baseball Club. Meanwhile, team owner Komajiro Tamura started another franchise that season, Gold Star, which signed many of Asahi's former players, as well as Asahi's former manager Michinori Tubouchi. To fill out its roster, Pacific signed long-time Tokyo Kyojin/Yomiuri Giants pitcher Victor Starffin, as well as some other famous players. These signings led to a serious conflict, and Pacific was forced to forfeit four games that season.
Taiyo Robins
English nicknames returned to Japanese baseball after the 1946 season, and the team changed its name to the Taiyo Robins. Still owned by Komajiro Tamura, "Taiyo" came from Tamura's fabric store Taiyo Rayon, and "Robins" from Tamura's personal nickname, "Koma". The kanji for "Taiyo" has connotations of the sun, and for a brief confusing period the team featured the words "Suns" on its road uniforms and "Robins" on its home uniforms. Starffin left after the 1947 season, and none of the name variations helped improve the team's play. The JBL reorganized after the 1949 season; the franchise ended its Japanese Baseball League run with a losing season every single year except 1943.
In 1950, when the JBL reorganized to become Nippon Professional Baseball, the Robins joined NPB's Central League. A share of the team was sold to Shochiku and it became the Shochiku Robins. Amazingly, that year the team won 46 more games than the year before, totaling 98 wins and coming in first in their division. Led by league MVP Makoto Kozuru and his 51 home runs and still-league record 163 RBI, they played in the inaugural Japan Series, ultimately falling to the Mainichi Orions, 4 games to 2.
After a mediocre year in 1951, they lost 84 games in 1952. It was decided that any Central League teams ending the season with a winning percentage below.300 would be disbanded or merged with other teams. The Robins fell into this category, and were merged with the Taiyo Whales to become the Taiyo Shochiku Robins in January 1953. The resulting franchise is now known as the Yokohama DeNA BayStars.
