Grammar › Comparison › いちばん
いちばん
"Number one." Drop 一番 in front of an adjective and it becomes a superlative — the most, the best, the -est. No special ending needed.
The short version
一番 (いちばん) literally means "position one". Set it before an adjective and you get "the most …" — 一番高い ("the tallest"), 一番好き ("like the best"). To name the field you're ranking within, front it with 〜の中で ("of / among all …").
果物の中で、りんごが一番好き — of all fruit, I like apples best
〜の中で ＋ 〜が ＋ 一番 ＋ adjective — field · winner · "the most" · quality
一番 + adjective = "the most …"
No comparative endings, no "-est" to conjugate — the adjective stays as it is, and 一番 does all the work.
一番怖いのは、
The scariest thing is… (一番 + 怖い = "the most frightening")
今が一番若いんですね。
Right now is the youngest you'll ever be. (一番 + 若い = "the most young")
Beyond adjectives — 一番 + a verb
一番 can also rank an action or a quantity: 一番売れる ("sells the most"), 一番大切にする ("value the most").
Watch out
🗣 一番 also means "most of all / above all" in the moment. Beyond formal rankings, people toss 一番 into speech for emphasis — 「これが一番!」 ("this one's the best!"). And in a two-way choice you'd normally reach for 〜のほうが, not 一番 — save 一番 for three or more.
一番 vs より. Use より・ほうが to compare two things ("A is more … than B"); use 一番 to crown one out of a whole set ("the most … of all"). The scope 〜の中で makes that set explicit.
Next: 上手・下手 — good / bad at → · 〜より・〜ほうが → · All grammar
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