On the 22nd, Lotte announced that they will be displaying a large flag in the right field stands for their opening game against Seibu Lions on March 27th (game starts at 6:30 PM Zozo Marine Stadium).

With the cooperation of the Big Flag Executive Committee and Chiba Lotte Marines cheering squad, a giant flag measuring 15m high and 75m wide, bearing the message "ONE HEART MARINES," will be displayed as part of the game's production, covering the right field stands around 6:25 PM, just before the start of the game.

The giant flag was created by The Marines Big Flag Executive Committee and was first unveiled at the home opener against Nippon-Ham Fighters on March 31, 2015. Last year, the home opener was canceled due to rain, so the flag was not displayed. This year marks the first time in two years that it will be displayed.