Unexplained Weight Loss

体重減少 (taijū genshō)

Unexplained weight loss is losing more than 5% of body weight over 6–12 months without intentional dieting or increased exercise. It can signal serious underlying conditions including cancer, diabetes, hyperthyroidism, depression, gastrointestinal disease, or chronic infections such as tuberculosis. Thorough evaluation including blood tests and imaging is warranted.

Japan's annual health checkup (健康診断, kenkō shindan) includes weight measurement and can detect unexpected changes over time.

In 9 languages

LanguageTerm
English Unexplained Weight Loss
Japanese (日本語) 体重減少
Chinese (中文) 体重减轻
Korean (한국어) 체중 감소
Portuguese Perda de peso inexplicada
Spanish Pérdida de peso inexplicada
Filipino Pagbaba ng timbang
Thai น้ำหนักลด
Vietnamese Sụt cân không rõ nguyên nhân
Romanization taijū genshō
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Last reviewed: September 2026