"Malicious god, leave and never return to our society! Our society welcomes only people praying for peace." is his tanka (thirty-one syllables' poem)-styled epitaph, which is inscribed on the pedestal of the statue of "Wakaba (young leaves)" in the Hiroshima Heiwa-koen Park.
広島平和公園にある若葉の像の台座に、湯川による短歌の銘文「まがつびよ　ふたたびここに　くるなかれ　平和をいのる　人のみぞここは」が刻まれている。