This seem to be because running dosfsck on FAT32 patition when ubuntu boots up.
But dosfsck has problem of multibyte characters - see #49217.
Ubuntu installer writes /etc/fstab as follows:
# /dev/sda1
UUID=3F19-1E0C /windowsvfatutf8,umask=007,gid=46 0 1
To avoid running
I found /var/log/fsck/checkfs includes rename log. attaching.
** Attachment added: checkfs
http://launchpadlibrarian.net/13417061/checkfs
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Ubuntu instration breaks Japanese file names on FAT32 patition
https://bugs.launchpad.net/bugs/217121
You received this bug notification because you
** Attachment added: Screenshot.png
http://launchpadlibrarian.net/13417028/Screenshot.png
** Description changed:
If FAT32 patition(s) are set to mount in Ubuntu installer(see attachment
image), some files named in Japanese characters on these patitions are renamed
improperly.
This is
