Use "ippon" in a sentence

1. In his 1956 autobiography, Funakoshi recounted several stories about Asato, including: Asato's political astuteness in following the government order to cut off the traditional men's topknot (pp. 13–14); Asato's defeat of Yōrin Kanna, in which the unarmed Asato prevailed despite Kanna being armed with an unblunted blade (pp. 14–15); Asato's demonstration of a single-point punch (ippon-ken; pp. 15); and Asato and Itosu's friendly arm-wrestling matches (p. 16).