Japanese display of graphs made with python

Install Japanese fonts such as IPA in advance. After downloading the zip, unzip it and right-click the .ttf file to install it. Information-technology Promotion Agency, Japan

The default font, sans-serif, must be changed to ʻIPA Gothic, ʻIPA Mincho, and so on.

There are two ways to do it

Play with ~ / .matplotlib / matplotlibrc
Declaration of font change at the beginning of the script

Play with ~ / .matplotlib / matplotlibrc

matplotlibrc is a matplotlib configuration file. ʻExecuted when import matplotlibis performed. If you save it in the directory under~ / .matplotlib with the name matplotlibrc, it will be read when you import matplotlib`.

Find out which rc config file is valid with the following code.

`Find out which matplot librc is valid`


>>> import matplotlib as mpl
>>> mpl.matplotlib_fname()
'C:\\Users\\python\\.matplotlib\\matplotlibrc'

The contents to be written are as follows. As I wrote at the beginning, in this case IPA Mincho is installed. You should be able to use other fonts. Look up the name.

`~/.matplotlib/matplotlibrc`


font.family : IPAMincho

Note startup.ipy

If seaborn is running at the same time as matplotlib.pyplot at startup, also perform the following operations.

seaborn settings

When importing seaborn, the default value font of the set function of rcmod.py in C: \ tools \ Anaconda3 \ Lib \ site-packages \ seaborn \ rcmod.py is" sans-serif ". Change from to "IPA Mincho" etc.

def set(context="notebook", style="darkgrid", palette="deep",
        font="IPAMincho", font_scale=1, color_codes=False, rc=None):

Declaration of font change at the beginning of the script

`Change font at the beginning of the script(matplotlib.pyplot)`


import matplotlib as mpl
mpl.rcParameters['font.family'] = 'IPAMincho'

`Change font at the beginning of the script(seaborn)`


sns.set(font=['IPAMincho'])

Font cache update

If the settings are correct but something goes wrong, updating the font cache with the following command may work.

import matplotlib as mpl
matplotlib.font_manager._rebuild()

Reference: Updating the Matplotlib Font Cache

[PYTHON] Japanese display of matplotlib, seaborn