[wp-trac] [WordPress Trac] #51097: post cannot be saved due to certain variant of Japanese Kanji

[WordPress Trac]

#51097: post cannot be saved due to certain variant of Japanese Kanji
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 Reporter:  mogami74      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Database      |     Version:  5.5
 Severity:  normal        |  Resolution:
 Keywords:  close         |     Focuses:
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Comment (by knutsp):

 Replying to [comment:3 mogami74]:
 > I checked the wp-config and found "define( 'DB_CHARSET', 'utf8' )".
 >
 > Thank you for your suggestion, @ishitaka.

 The thing is the actual storage (and the selected collation that forces
 it) for each column in each table in the database. This can't be changed
 in wp-config, and AFAIK utf8 for the connection is equivalent to utf8mb4,
 because WordPress will then use ut48mb4. But WordPress will not change the
 collation of columns after they have been created. Tools like phpMyAdmin
 is what you need. Ask hosting provider.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51097#comment:4>
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