健康診断（けんこうしんだん、kenkoushiんdaん）
- health checkup

The Japanese word 健康診断 （けんこうしんだん） means "health checkup," "medical examination," or "physical examination." It refers to a comprehensive evaluation of a person's health, typically performed by medical professionals. The purpose of a 健康診断 is to detect potential health problems early on, assess overall health status, and provide recommendations for maintaining or improving one's well-being. It can involve various tests and examinations, such as blood tests, urine tests, physical measurements, and imaging scans.

⚫︎ 会社で年に一度、健康診断］を受けます。 Translation: I have a health checkup once a year at my company. ⚫︎ 健康診断］の結果、少しコレステロールが高いと言われました。 Translation: As a result of the health checkup, I was told that my cholesterol was a little high. ⚫︎ 学校では、入学前に健康診断］が義務付けられています。 Translation: At school, a health checkup is required before enrollment.

You use 健康診断 in situations where you are talking about a medical checkup to assess your health. It is commonly used in discussions about preventative healthcare, medical appointments, and results from these examinations. You can use it when discussing scheduled appointments or reporting on the findings.

健康診断 is typically written with the kanji 健康 (kenkou - health) and 診断 (shindan - diagnosis/examination). The reading is けんこうしんだん in hiragana. There is no other common way to write it. The okurigana is standard.

⚫︎ 人間ドック（ningen dokku): A comprehensive medical checkup, usually more thorough than a standard 健康診断. ⚫︎ 検診（kenshin): Medical examination, screening. This can be used as a broader term for health examinations, including specific screenings like cancer screening.

There are no direct antonyms for 健康診断 in the same way as words like "good" and "bad." The concept is about prevention and assessment, not an opposite action. However, the absence of a health checkup, or neglecting one's health, could be considered the opposite in a practical sense.

来週、会社の健康診断］があります。 ・Translation: I have a health checkup at work next week. ・Explanation: This sentence simply states when the health checkup will take place.

健康診断］の結果で、異常が見つからなければ安心です。 ・Translation: It's reassuring if no abnormalities are found in the results of the health checkup. ・Explanation: This sentence expresses the positive feeling of receiving a clean bill of health after a 健康診断.

The word 健康診断 is composed of two parts: 健康 (kenkou), which means "health" and 診断 (shindan), which means "diagnosis" or "examination." The combination, therefore, accurately reflects the purpose of the activity: to examine or assess someone's health.