diff --git a/locale/ja_JP.po b/locale/ja_JP.po
deleted file mode 100644
index b006289794..0000000000
--- a/locale/ja_JP.po
+++ /dev/null
@@ -1,154 +0,0 @@
-#
-msgid ""
-msgstr "Content-Type: text/plain; charset=utf-8\n"
-
-msgctxt "field:party.party,relations:"
-msgid "Relations"
-msgstr ""
-
-msgctxt "field:party.relation,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:party.relation,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:party.relation,from_:"
-msgid "From"
-msgstr ""
-
-msgctxt "field:party.relation,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:party.relation,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:party.relation,to:"
-msgid "To"
-msgstr ""
-
-msgctxt "field:party.relation,type:"
-msgid "Type"
-msgstr ""
-
-msgctxt "field:party.relation,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:party.relation,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "field:party.relation.all,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:party.relation.all,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:party.relation.all,from_:"
-msgid "From"
-msgstr ""
-
-msgctxt "field:party.relation.all,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:party.relation.all,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:party.relation.all,to:"
-msgid "To"
-msgstr ""
-
-msgctxt "field:party.relation.all,type:"
-msgid "Type"
-msgstr ""
-
-msgctxt "field:party.relation.all,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:party.relation.all,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "field:party.relation.type,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:party.relation.type,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:party.relation.type,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:party.relation.type,name:"
-msgid "Name"
-msgstr ""
-
-msgctxt "field:party.relation.type,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:party.relation.type,reverse:"
-msgid "Reverse Relation"
-msgstr ""
-
-msgctxt "field:party.relation.type,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:party.relation.type,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "help:party.relation.type,name:"
-msgid "The main identifier of the relation type."
-msgstr ""
-
-msgctxt "help:party.relation.type,reverse:"
-msgid "Create automatically the reverse relation."
-msgstr ""
-
-msgctxt "model:ir.action,name:act_relation_all"
-msgid "Party Relations"
-msgstr "Party Relations"
-
-msgctxt "model:ir.action,name:act_relation_type"
-msgid "Relation Types"
-msgstr "Relation Types"
-
-msgctxt "model:ir.ui.menu,name:menu_relation_all"
-msgid "Party Relations"
-msgstr "Party Relations"
-
-msgctxt "model:ir.ui.menu,name:menu_relation_type"
-msgid "Relation Types"
-msgstr "Relation Types"
-
-#, fuzzy
-msgctxt "model:party.relation,name:"
-msgid "Party Relation"
-msgstr "Party Relations"
-
-#, fuzzy
-msgctxt "model:party.relation.all,name:"
-msgid "Party Relation"
-msgstr "Party Relations"
-
-#, fuzzy
-msgctxt "model:party.relation.type,name:"
-msgid "Relation Type"
-msgstr "Relation Types"
-
-msgctxt "view:party.party:"
-msgid "Relations"
-msgstr ""