There is a new offering from Satosan Metals - Tsururkame, a 1 ounce silver round. This particular offering is serial numbered and limited to only 100 pieces. Satosan Metals previously sold / is selling other Japanese-themed silver bullion rounds: Asahi 2015 (300 pieces), 2016 Asahi (100 pieces), and 2017 Asahi, and 2016 Tsukiakari (300 pieces) and 2017 Tsukiakarai (100 pieces). From what I can see, the sold out rounds are selling for more than their introductory prices.
I think mintage numbers this year is starting at a higher number as they are reserving early numbers for special editions like gilding. As my COA starts at 302
