However, it was discovered in 1998 that two documents of Shinkan (original handwriting of the emperor) of Emperor Gobunko called "Nenchugyoji" (events within the year) stored in Higashiyama Gobunko of the Imperial Palace, Kyoto was the manuscript of "Sinsen Nenchugyoji" by contrasting with the little remaining manuscript, and came under attention of researchers.
しかし1998年、京都御所内東山御文庫に所蔵されていた後西天皇の宸翰『年中行事』という二冊の書物が『新撰年中行事』の写本であることが逸文との照合等により判明し、研究者の注目を集めている。