〜がいちばん ga ichiban
〜がいちばん（ga ichiban）means “... is the best / the most”. Marks the noun that ranks highest within a group. Formation: N + がいちばん（＋ Aい／Aな／好き など）
... is the best / the most
N5Formation
N + がいちばん（＋ Aい／Aな／好き など）
Explanation
Marks the noun that ranks highest within a group. いちばん ("number one / most") is often followed by an adjective or 好き to say something is the best, biggest, most liked, etc. The topic group can be shown with 〜の中で.
Examples
Note
The comparison group is usually marked with 〜の中で or 〜で.
FAQ
〜がいちばん — what does it mean and how is it used?
... is the best / the most. Marks the noun that ranks highest within a group. いちばん ("number one / most") is often followed by an adjective or 好き to say something is the best, biggest, most liked, etc. The topic group can be shown with 〜の中で.
〜がいちばん — how do you form it?
N + がいちばん（＋ Aい／Aな／好き など）
〜がいちばん — any usage notes?
The comparison group is usually marked with 〜の中で or 〜で.