王者|おうじゃouja[1]atamadaka (head-high)

1. nounking; monarch; ruler
   カリフォルニアには有名ゆうめいな大木たいぼく、つまり、いわゆる森もりの王者おうじゃがある。↗

   In California are the famous big trees, or "forest kings" as they are called.
2. nounchampion

• Synonym王おうNeutralA king, and by extension the strongest in a field, as in 「百獣の王」. 王者 more often means a champion or dominant ruler.
• Synonym覇者はしゃWrittenA written/formal term for one who rules by force of arms; also a tournament winner. 王者 can more broadly mean the strongest person in any field.
• SynonymキングCasualColloquial loanword for a king or the most outstanding person, also the king in cards or chess. For a champion or dominant ruler, 王者 is the usual choice.
• SynonymチャンピオンNeutralLoanword for a champion or titleholder, leaning toward competition titles. 王者 also means the strongest person in a field, beyond winning titles.
• Synonym大君たいくんWrittenA written/formal term: an honorific for a monarch, or the Edo shogunate's official title for the shogun in dealings abroad. Never means a champion.
• Related名人めいじんNeutralA person of superb skill; also a professional title in go and shogi. 王者 stresses supremacy and championship rather than sheer craftsmanship.
• RelatedスターCasualColloquial loanword for a popular star or celebrity. 王者 is about being number one in ability, not about popularity.
• RelatedクイーンCasualColloquial loanword for a queen, also figuratively the top woman in her field. 王者 is not restricted by gender.
• Related第一人者だいいちにんしゃWrittenA written/formal term for the person recognized as the best in a field, often in academic circles. 王者 leans toward dominance in competition.
• Related巨匠きょしょうWrittenA written/formal term for an eminent master, especially in the arts. 王者 leans toward supremacy in athletic or competitive arenas.
• Related達人たつじんNeutralA master with deep command of a study or craft. 王者 stresses being the top-ranked winner.
• RelatedエースCasualColloquial loanword for a team's key player or ace pitcher. 王者 is the strongest, top-ranked figure in the whole field.
• RelatedスーパースターCasualColloquial loanword for a world-famous superstar. 王者 emphasizes reigning over a field by sheer ability.
• RelatedナンバーワンCasualColloquial loanword meaning number one, the best of many. 王者 carries the air of a dominant ruler.
• Related千両役者せんりょうやくしゃCasualColloquial term, originally a top-billed actor; figuratively someone who shines when the moment counts. 王者 is about prevailing over rivals and ruling the field.
• Related大立者おおだてものWrittenA written/formal term for the most famous, influential figure in a field. 王者 leans toward the champion in competition.
• Related立役者たてやくしゃWrittenA written/formal term for the key figure behind a success, the one who made it happen. 王者 is the reigning champion.
• Antonym敗者はいしゃWrittenA written/formal term for the loser of a contest — the opposite of 王者, the winner.

Use 「王者」 for the strongest person in a field or for a champion — a reigning, dominant figure. Competition winners can also be 「チャンピオン」 or 「覇者」; masters of a craft or art are 「名人」 or 「達人」; the key figure behind a success is 「立役者」. Loanwords like 「キング」「スター」「エース」 fill their own niches, and 「第一人者」「巨匠」「大立者」 are written terms for leading figures. The opposite of 「王者」 is 「敗者」, the loser.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 帝王ていおうである人ひと。
2. その分野ぶんやで最もっとも実力じつりょくのある人ひと。