性行為感染症 せいこういかんせんしょう Meanings Noun sexually transmitted disease; sexually transmitted infection; STD; STI Kanji 性 nature. Read as セイ. 行 go. Read as コウ. 為 sake 感 feel. Read as カン. 染 stain. Read as セン. 症 symptom. Read as ショウ. Word lists Medicine Jinuma: Japanese Dictionary · Word lists