Since the 2009 publication of Yonaiyama Shards Ⅰ, new materials collected by Yonaiyama at the Jiaotanxia site were discovered at Mayuyama Ryusendo. This new find included a large number of kiln tools as well as shards. We decided to publish this bulletin in the belief that these newly discovered materials make a valuable contribution to the study on Southern Song Guan-yao wares.