In addition to handling these tangible cultural properties, the Foundation of the Shigure-tei library of the Reizei family was established to preserve records of ancient cultural practices like the Tanabata Star Festival (the festival of the Weaver, which still takes place on the seventh day of the seventh month) as well, and to preserve the Reizei family's poetic conventions as a family famed for its waka poems.
こうした有形文化財に加え、乞巧奠（きっこうてん、七夕）のような昔ながらの年中行事や和歌の家としての伝統を保持するため、財団法人冷泉家時雨亭文庫が設立された。