noun-modifying (irregular)
flagship (product, company, etc.)
Used prenominally to describe the most important or leading product, store, or brand within a group.
あのスマートフォンは同社のフラッグシップモデルだ。
That smartphone is the company's flagship model.
noun
Refers to the ship carrying the fleet commander; less common than the business sense in everyday Japanese.
See also: 旗艦
その艦隊のフラッグシップは最新鋭の駆逐艦だった。
The fleet's flagship was a state-of-the-art destroyer.