Also they sell official F/GO Pop Sockets in Amazon Japan for ¥1 700
https://www.amazon.co.jp/%EF%BC%88%E6%A0%AA%EF%BC%89%E3%82%A2%E3%83%83%E3%83%97%E3%83%89%E3%83%A9%E3%83%95%E3%83%88-%E3%80%8EFate-Grand-Order%E3%80%8F%C3%97%E3%80%8E%E3%83%9D%E3%83%83%E3%83%97%E3%82%BD%E3%82%B1%E3%83%83%E3%83%84%E3%83%BB%E3%82%B0%E3%83%AA%E3%83%83%E3%83%97%E3%80%8F-%E3%83%A9%E3%83%B3%E3%82%B5%E3%83%BC%EF%BC%8F%E3%82%B9%E3%82%AB%E3%82%B5%E3%83%8F/dp/B07K8LGQ4Q/
