The Saitama Seibu Lions are a professional baseball team based in Saitama, Tokorozawa, Japan, competing in Nippon Professional Baseball's Pacific League. This unofficial Saitama Seibu Lions flag (Japanese: 埼玉西武ライオンズの非公式旗) consists of the team's official logo and a dark blue background derived from the club's visual identity and traditional colors.
| Flag Proportion: | 3:5 (standard flag ratio) |
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| Flag Format: | Animated GIF (25-frame loop) |
| Flag Usage: | Fan-made / unofficial digital flag |
The Saitama Seibu Lions logo features a stylized depiction of a baseball held within a lion's paw, alongside the team name "Saitama Seibu Lions" written in an Old English-style font. The lion serves as the central symbol of the emblem, representing strength, courage, and leadership, qualities the team associates with its competitive identity in Japanese baseball. The imagery of the lion gripping a baseball reinforces themes of control, dominance, and determination on the field. The name "Seibu" originates from the Seibu Group, the corporate owner of the team, reflecting its organizational heritage and connection to a major Japanese conglomerate. The dark blue color scheme enhances the logo's sense of tradition, stability, and professionalism. Overall, the emblem expresses the team's ambition to remain a powerful and enduring presence in Nippon Professional Baseball.
Alternative Flag Designs
| Team Name: | Saitama Seibu Lions |
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| Team Nickname: | Shishi (獅子, lion) |
| Team Abbreviation: | |
| Founded: | 1949 |
| Location: | Tokorozawa, Saitama, Japan |
| League: | Pacific League |
| Team Colors: | Navy, Light Blue, Red |
| Japan Series titles: | 13 |
| Pennants: | 23 |
| Ballpark: | Belluna Dome |
| Mascots: | Leo and Lina |










