In the letter dated May 16, 1635, he gave a special instruction 'hawk picture folding screens should be created and carried to Nikko, and for external fame, pictures should be drawn skillfully' and he showed satisfaction with the result in the letter dated April 8, 1636, 'twelve hawk picture plates were delivered safely and they have painted excellently' ('Book by Tadakatsu SAKAI vol.2').
寛永十二年五月十六日付書状では、「鷹之絵屏風弐双分成程念を入書セ可申候、日光へ上ケ申候間、末代之事ニ候間、其段絵書ニ能申付書セ可申」と、特段の吟味を指示し、完成後の翌十三年四月八日付では、「鷹之絵板十二枚無事ニ相届候、絵も一段能書申候」とその出来映えに満足している（「酒井忠勝書下」）。