diff --git a/locale/ja_JP.po b/locale/ja_JP.po
deleted file mode 100644
index 25f0b403c6..0000000000
--- a/locale/ja_JP.po
+++ /dev/null
@@ -1,191 +0,0 @@
-#
-msgid ""
-msgstr "Content-Type: text/plain; charset=utf-8\n"
-
-msgctxt "error:sale.promotion:"
-msgid ""
-"Invalid formula \"%(formula)s\" in promotion \"%(promotion)s\" with "
-"exception \"%(exception)s\"."
-msgstr ""
-
-msgctxt "field:sale.line,draft_unit_price:"
-msgid "Draft Unit Price"
-msgstr ""
-
-#, fuzzy
-msgctxt "field:sale.line,promotion:"
-msgid "Promotion"
-msgstr "Promotions"
-
-msgctxt "field:sale.promotion,active:"
-msgid "Active"
-msgstr ""
-
-msgctxt "field:sale.promotion,categories:"
-msgid "Categories"
-msgstr ""
-
-msgctxt "field:sale.promotion,company:"
-msgid "Company"
-msgstr ""
-
-msgctxt "field:sale.promotion,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:sale.promotion,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:sale.promotion,end_date:"
-msgid "End Date"
-msgstr ""
-
-msgctxt "field:sale.promotion,formula:"
-msgid "Formula"
-msgstr ""
-
-msgctxt "field:sale.promotion,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:sale.promotion,name:"
-msgid "Name"
-msgstr ""
-
-msgctxt "field:sale.promotion,price_list:"
-msgid "Price List"
-msgstr ""
-
-msgctxt "field:sale.promotion,products:"
-msgid "Products"
-msgstr ""
-
-msgctxt "field:sale.promotion,quantity:"
-msgid "Quantity"
-msgstr ""
-
-msgctxt "field:sale.promotion,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:sale.promotion,start_date:"
-msgid "Start Date"
-msgstr ""
-
-msgctxt "field:sale.promotion,unit:"
-msgid "Unit"
-msgstr ""
-
-msgctxt "field:sale.promotion,unit_digits:"
-msgid "Unit Digits"
-msgstr ""
-
-msgctxt "field:sale.promotion,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:sale.promotion,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.category,category:"
-msgid "Category"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.category,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.category,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.category,id:"
-msgid "ID"
-msgstr ""
-
-#, fuzzy
-msgctxt "field:sale.promotion-product.category,promotion:"
-msgid "Promotion"
-msgstr "Promotions"
-
-msgctxt "field:sale.promotion-product.category,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.category,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.category,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.product,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.product,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.product,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.product,product:"
-msgid "Product"
-msgstr ""
-
-#, fuzzy
-msgctxt "field:sale.promotion-product.product,promotion:"
-msgid "Promotion"
-msgstr "Promotions"
-
-msgctxt "field:sale.promotion-product.product,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.product,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:sale.promotion-product.product,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "help:sale.promotion,active:"
-msgid "Uncheck to exclude from future use."
-msgstr ""
-
-msgctxt "help:sale.promotion,formula:"
-msgid ""
-"Python expression that will be evaluated with:\n"
-"- unit_price: the original unit_price"
-msgstr ""
-
-msgctxt "model:ir.action,name:act_promotion_form"
-msgid "Promotions"
-msgstr "Promotions"
-
-msgctxt "model:ir.action,name:act_promotion_relate"
-msgid "Sale Promotions"
-msgstr "Sale Promotions"
-
-msgctxt "model:ir.ui.menu,name:menu_promotion"
-msgid "Promotions"
-msgstr "Promotions"
-
-#, fuzzy
-msgctxt "model:sale.promotion,name:"
-msgid "Sale Promotion"
-msgstr "Sale Promotions"
-
-msgctxt "model:sale.promotion-product.category,name:"
-msgid "Sale Promotion - Product Category"
-msgstr ""
-
-msgctxt "model:sale.promotion-product.product,name:"
-msgid "Sale Promotion - Product"
-msgstr ""