高校|こうこうkoukou[0]heiban (flat)

1. nounsenior high school; high school
   私の息子むすこは、高校こうこうに入学にゅうがくした。↗

   My son entered high school.

• Synonym高等学校こうとうがっこうFormalThe formal full name of 「高校」, used mainly in laws and regulations and school names; in everyday speech people say 「高校」.
• SynonymハイスクールNeutralA loanword meaning the same as 「高校」, used mostly for high schools abroad or in school names; for Japanese high schools 「高校」 is the usual word.
• Antonym中学校ちゅうがっこうNeutralThe opposite of 「高校」: the three years of junior high school that come before it.

Say 「高校」 for high school in everyday conversation. Use 「高等学校」 as the formal full name in legal or official contexts and school names, and 「ハイスクール」 mainly for schools abroad or in names; 「中学校」 is junior high, the three years before.

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

1. 中学ちゅうがく卒業後そつぎょうご、3年間ねんかん通かよう学校がっこう。大学だいがく進学しんがくや就職しゅうしょくの準備じゅんびをする。