Not only as a statesman, Natsui was also famed for his skillful hand, and particularly in the field of kaisho (basic, block style of writing Chinese characters) was he called a Shosei (who was a greatly talented and respected calligrapher).
その一方、能書家しても名高く、特に楷書の分野においては聖とまで言われるほどの才能を発揮した。