Translating Teapot lid This lid is from a 'Japanese' cast iron teapot lid. I was told the Japanese used Chinese Characters on cast iron teapots. Can anyone verify this? Could I also please get a translation.
The Japanese term 勤續 means "duty"  

結婚勤續二十周年紀念 literally means "20th Anniversary of marry duty

It is better to translate it as  "20th Anniversary of Diligent Marriage"