Use jreport to the docclass for Japanese howto documents

CHANGES

@@ -32,6 +32,9 @@ Incompatible changes
   to improve readability.
 * latex: To provide good default settings to Japanese docs, Sphinx uses ``jsbooks``
   as a docclass by default if the `language` is ``ja``.
+* latex: To provide good default settings to Japanese docs, Sphinx uses
+  ``jreport`` and ``jsbooks`` as a docclass by default if the `language` is
+  ``ja``.
 
 
 Features added

doc/config.rst

@@ -1711,7 +1711,8 @@ These options influence LaTeX output. See further :doc:`latex`.
 
    .. versionchanged:: 1.5
 
-      In Japanese docs, ``'jsbooks'`` is used to manual by default
+      In Japanese docs(`language` is ``ja``), ``'jreport'`` is used for
+      ``'howto'`` and ``'jsbooks'`` is used for ``'manual'`` by default.
 
 .. confval:: latex_additional_files
 

sphinx/builders/latex.py

@@ -284,8 +284,11 @@ def setup(app):
     app.add_config_value('latex_font_size', '10pt', None)
     app.add_config_value('latex_elements', {}, None)
     app.add_config_value('latex_additional_files', [], None)
+
+    japanese_default = {'manual': 'jsbook',
+                        'howto': 'jreport'}
     app.add_config_value('latex_docclass',
-                         lambda self: {'manual': 'jsbook'} if self.language == 'ja' else {},
+                         lambda self: japanese_default if self.language == 'ja' else {},
                          None)
     # now deprecated - use latex_elements
     app.add_config_value('latex_preamble', '', None)