diff --git a/ochintin-daicho.cabal b/ochintin-daicho.cabal
--- a/ochintin-daicho.cabal
+++ b/ochintin-daicho.cabal
@@ -1,5 +1,5 @@
 name:                ochintin-daicho
-version:             0.3.0.0
+version:             0.3.1.0
 synopsis:            A module to manage payroll books for Japanese companies.
 description:
     A module to manage payroll books for Japanese companies. This enable to export data to tax withholding book, etc...
diff --git a/src/Business/OchintinDaicho.hs b/src/Business/OchintinDaicho.hs
--- a/src/Business/OchintinDaicho.hs
+++ b/src/Business/OchintinDaicho.hs
@@ -24,6 +24,8 @@
   -- * Types
   , Person(..)
   , Payment(..)
+  , PaymentCore(..)
+  , PaymentMeta(..)
   , Payments
   , Hours