The "Konjaku Monogatari Shu" (The Tale of Times Now Past) is said to have been written in the early twelfth century, but it was called 'Tsuwamono' (written as 兵) or 'rich person.'
『今昔物語集』は12世紀初頭の成立といわれるが、呼ばれ方は「兵（つわもの）」「豪の者」である。