Muromachi (1333-1573) or Momoyama (1573-1615) period, 16th/17th century The first, an oval shakudo plate carved with open and closed fans on turbulent waves in takabori and shishiaibori with highlights of gold takazogan; the second, a rounded spindle-shaped shakudo plate carved with crashing waves in shishiaibori, the dots of foam in silver and gold takazogan The first with Hozon Tosogu (Sword Fitting Worthy of Preservation) certificate no. 4010723 issued by the Nihon Bijutsu Token Hozon Kyokai (Society for the Preservation of the Japanese Art Sword), dated November 8, 2016 Each with a wood tomobako storage box 3 1/16in (7.8cm); 2 7/8in (7.3cm) high