理科|りかrika[1]atamadaka (head-high)

1. nounscience (natural sciences and related fields, incl. mathematics, engineering, medicine, etc.)
   彼女かのじょは理科りかを勉強べんきょうしなければなりません。↗

   She has to study science.
2. nounfaculties of science, engineering, medicine, etc. (at a university)
3. nounscience (as a school subject)
   彼かれは理科りかを２科目かもくとらなければならない。↗

   He has to take two science classes.

• Synonym自然科学しぜんかがくWritten「自然科学」 is the written, academic term for the disciplines that study natural phenomena; 「理科」 is mostly used in educational contexts.
• Related科学かがくNeutral「科学」 means science as a whole, including the social sciences; 「理科」 usually refers to the science subject taught at school.
• Antonym文科ぶんかNeutral「文科」 covers the humanities and social sciences, the track opposite to 「理科」, as in 「文科系」.

Use 「理科」 for the school science subject or a science course/faculty. For science as a field of study choose 「科学」, for the academic natural sciences 「自然科学」, and for the humanities side 「文科」.

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

1. 学校教育がっこうきょういくの教科きょうか。物理ぶつり、化学かがく、生物せいぶつ、地学ちがくの科目かもくに分わけられる。
2. 大学だいがく教育きょういくにおける自然科学しぜんかがく、形式けいしき科学かがく、応用おうよう科学かがく分野ぶんや。