1 files changed, 72 insertions, 0 deletions
diff --git a/doc/ja/weechat_user.ja.adoc b/doc/ja/weechat_user.ja.adoc
index 97e79abf5..1c5cabcc9 100644
--- a/doc/ja/weechat_user.ja.adoc
+++ b/doc/ja/weechat_user.ja.adoc
@@ -531,6 +531,78 @@ gdb /usr/bin/weechat 12345
 (gdb) bt full
 ----
 
+// TRANSLATION MISSING
+[[upgrade]]
+=== Upgrade
+
+If a new stable version of WeeChat is released, this is time for you to
+switch to this version.
+
+First of all, you must install the new version of WeeChat, either with your
+package manager or by compiling yourself, so that the `weechat` binary and all
+required files are in the same paths. +
+This can be done while WeeChat is running.
+
+// TRANSLATION MISSING
+[[upgrade_command]]
+==== Upgrade command
+
+WeeChat can restart the new binary, in place, using the
+<<command_weechat_upgrade,/upgrade>> command: the buffer contents and non-SSL
+connections are preserved. +
+The SSL connections are lost during upgrade and you are automatically
+reconnected after the upgrade (reload of SSL sessions is currently not possible
+with GnuTLS).
+
+The command can also be used if you have to restart the machine, for example
+to upgrade the kernel or to move your WeeChat to another machine:
+
+----
+/upgrade -quit
+----
+
+This saves the current state in `*.upgrade` files. You can then either reboot
+or move the whole directory `~/.weechat` to another machine, and restart
+WeeChat later with this command:
+
+----
+$ weechat --upgrade
+----
+
+// TRANSLATION MISSING
+[[restart_after_upgrade]]
+==== Restart after upgrade
+
+===== Release notes
+
+After an upgrade, it is *strongly recommended* to read the
+https://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
+which contain important information about breaking changes and some
+manual actions that could be required.
+
+You must read the release notes of all versions between your old (excluded) and
+your new version (included). +
+For example if you switch from version 3.0 to 3.2, you must read release notes
+of versions 3.1 and 3.2.
+
+===== Configuration upgrade
+
+WeeChat has an automatic upgrade of configuration files (`*.conf`):
+
+* new options are silently added with default value
+* obsolete options are automatically discarded and WeeChat displays a warning
+  with the value read from file.
+
+Example of warning when an option has been removed:
+
+----
+=!= 警告: /home/xxx/.weechat/sec.conf, 行 15: セクション "crypt" の無効なオプション: passphrase_file = ""
+----
+
+That means the option `sec.crypt.passphrase_file` has been removed, and you
+had value set to empty string, which was the default value in the previous version
+(in this case no manual action is required).
+
 [[usage]]
 == 使い方