According to the legend, when Kiyochika was sketching a snowscape of the riverside of the Sumida-gawa River from Mukojima on a snowy day, Yasuji watched him sketching so intently for nearly two hours that Yasuchika spoke to him, which made Yasuji become a disciple of Kiyochika.
伝えるところによると、ある雪の日、清親が向島から隅田川沿岸の雪景色をスケッチをしていると、安治はそれを二時間余りも見守り続け、その余りの熱心さに清親が話しかけ、これが入門の切っ掛けになったという。