A secure database was developed through a collaboration of NTT Neomeit Corporation using Gfarm file systems developed by AIST. Main features of the secure database are 1)Each record of the database is chopped into very small (several bytes) pieces and they are distributed over the Gfarm files systems in different places. 2)When an operator uses the database it is reconstructed temporarily on a RAM disk from the Gfarm file systems, so the data automatically disappear at an instance of system shutdowns. 3)Meta-data which contains locations of the divided pieces are encoded and decoded solely by authorized secret keys.