Wazamono is a classification of Japanese swords and swordsmiths used in Japan to identify historic blades of exceptional quality. According to the first edition of Kaiho Kenjaku (懐宝剣尺) published in 1797, There are 163 Wazamono swords in total, grouped into four categories based on their quality. Twelve swords are classified as Saijō Ō Wazamono (Supreme Grade), twenty-one swords are classified as Ō Wazamono (Excellent), fifty swords are classified as Yoki (Ryō) Wazamono (Very Good), and eighty swords are classified as Wazamono (Good).
