From a different listing, a little more info....

Kamakura Kokuhokan
  CATEGORY
               Culture:Museums and Art Museums:Public Art Museums
  TYPE
               Municipal
  ADDRESS
               2-1-1 Yukinoshita, Kamakura-shi, Kanagawa-248-0005
  PHONE
               0467-22-0753
  FAX
               0467-23-5953
  E-MAIL
  HOMEPAGE
  REMARKS
               Houses an abundance of cultural properties ranging from
the Kamakura to Muromachi periods, including national
               treasures and important cultural properties.
--
Timothy L. Campbell
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http://www.geocities.com/Tokyo/Towers/8189