diff --git a/locale/ja_JP.po b/locale/ja_JP.po
deleted file mode 100644
index f73980e875..0000000000
--- a/locale/ja_JP.po
+++ /dev/null
@@ -1,231 +0,0 @@
-#
-msgid ""
-msgstr "Content-Type: text/plain; charset=utf-8\n"
-
-msgctxt "error:product.template:"
-msgid ""
-"You cannot change the cost price for a product which is associated to stock moves.\n"
-"You must use the \"Update Cost Price\" wizard."
-msgstr ""
-
-msgctxt "error:product.update_cost_price:"
-msgid "The stock account and the counterpart can not be the same account"
-msgstr ""
-
-msgctxt "field:account.configuration,cost_price_counterpart_account:"
-msgid "Cost Price Counterpart Account"
-msgstr ""
-
-msgctxt "field:account.configuration,stock_journal:"
-msgid "Stock Journal"
-msgstr ""
-
-msgctxt "field:account.configuration.cost_price_counterpart_account,company:"
-msgid "Company"
-msgstr ""
-
-msgctxt ""
-"field:account.configuration.cost_price_counterpart_account,cost_price_counterpart_account:"
-msgid "Cost Price Counterpart Account"
-msgstr ""
-
-msgctxt ""
-"field:account.configuration.cost_price_counterpart_account,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt ""
-"field:account.configuration.cost_price_counterpart_account,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:account.configuration.cost_price_counterpart_account,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:account.configuration.cost_price_counterpart_account,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt ""
-"field:account.configuration.cost_price_counterpart_account,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt ""
-"field:account.configuration.cost_price_counterpart_account,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "field:account.configuration.stock_journal,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:account.configuration.stock_journal,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:account.configuration.stock_journal,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:account.configuration.stock_journal,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:account.configuration.stock_journal,stock_journal:"
-msgid "Stock Journal"
-msgstr ""
-
-msgctxt "field:account.configuration.stock_journal,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:account.configuration.stock_journal,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "field:account.fiscalyear,account_stock_method:"
-msgid "Account Stock Method"
-msgstr ""
-
-msgctxt "field:product.category,account_stock:"
-msgid "Account Stock"
-msgstr ""
-
-msgctxt "field:product.category,account_stock_customer:"
-msgid "Account Stock Customer"
-msgstr ""
-
-msgctxt "field:product.category,account_stock_lost_found:"
-msgid "Account Stock Lost and Found"
-msgstr ""
-
-msgctxt "field:product.category,account_stock_production:"
-msgid "Account Stock Production"
-msgstr ""
-
-msgctxt "field:product.category,account_stock_supplier:"
-msgid "Account Stock Supplier"
-msgstr ""
-
-msgctxt "field:product.category.account,account_stock:"
-msgid "Account Stock"
-msgstr ""
-
-msgctxt "field:product.category.account,account_stock_customer:"
-msgid "Account Stock Customer"
-msgstr ""
-
-msgctxt "field:product.category.account,account_stock_lost_found:"
-msgid "Account Stock Lost and Found"
-msgstr ""
-
-msgctxt "field:product.category.account,account_stock_production:"
-msgid "Account Stock Production"
-msgstr ""
-
-msgctxt "field:product.category.account,account_stock_supplier:"
-msgid "Account Stock Supplier"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.ask,cost_price:"
-msgid "Cost Price"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.ask,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.ask,product:"
-msgid "Variant"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.ask,template:"
-msgid "Product"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,amount:"
-msgid "Amount"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,counterpart:"
-msgid "Counterpart"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,currency_digits:"
-msgid "Currency Digits"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,description:"
-msgid "Description"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,journal:"
-msgid "Journal"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,price_difference:"
-msgid "Price Difference"
-msgstr ""
-
-msgctxt "field:product.update_cost_price.show_move,stock_account:"
-msgid "Stock Account"
-msgstr ""
-
-msgctxt "model:account.configuration.cost_price_counterpart_account,name:"
-msgid "Account Configuration Cost Price Counterpart Account"
-msgstr ""
-
-msgctxt "model:account.configuration.stock_journal,name:"
-msgid "Account Configuration Stock Journal"
-msgstr ""
-
-msgctxt "model:ir.action,name:wizard_update_cost_price"
-msgid "Update Cost Price"
-msgstr "Update Cost Price"
-
-#, fuzzy
-msgctxt "model:product.update_cost_price.ask,name:"
-msgid "Update Cost Price Ask"
-msgstr "Update Cost Price"
-
-msgctxt "model:product.update_cost_price.show_move,name:"
-msgid "Update Cost Price Show Move"
-msgstr ""
-
-msgctxt "selection:account.fiscalyear,account_stock_method:"
-msgid "Continental"
-msgstr ""
-
-msgctxt "selection:account.fiscalyear,account_stock_method:"
-msgid "None"
-msgstr ""
-
-msgctxt "view:account.configuration:"
-msgid "Stock"
-msgstr ""
-
-msgctxt "view:account.fiscalyear:"
-msgid "Account Stock"
-msgstr ""
-
-msgctxt "wizard_button:product.update_cost_price,ask_price,end:"
-msgid "Cancel"
-msgstr ""
-
-msgctxt "wizard_button:product.update_cost_price,ask_price,should_show_move:"
-msgid "OK"
-msgstr ""
-
-msgctxt "wizard_button:product.update_cost_price,show_move,create_move:"
-msgid "OK"
-msgstr ""
-
-msgctxt "wizard_button:product.update_cost_price,show_move,end:"
-msgid "Cancel"
-msgstr ""