A rare and important Japanese Wakizashi sword signed ‘Izumi no Kami Kunisada’, a second generation smith, later known as ‘Inoue Shinkai’ complete with authentication papers (Tokubetsu Hozon level) issued by the Japanese Sword Preservation Society (NBTHK) stating that this sword is especially worthy of preservation. The 56 cm blade is in full polish with a very flamboyant and active hamon (temper pattern), typical of his early work. Shinkai was the eldest son of the first generation Izumi (no) Kami Kunisada. In the beginning he inscribed his name in the same manner as his father, Kunisada. He is known to have made many Daisaku blades for his father in his father’s later years. Around 1661 he received the right to put the Kiku mon on his blade. Around 1672 he became a lay priest and started signing his name Inoue Shinkai. He died suddenly on November 9, 1682. He is recognised as one of the best smiths of the Shinto (late 16th century to late 18th century) period rated Saijo Saku (Supreme made), one of only nine Smiths given this ranking in that period