[1]A Spectre is Haunting Unicode:

    In 1978 Japan's Ministry of Economy, Trade and Industry established
    the encoding that would later be known as JIS X 0208, which still
    serves as an important reference for all Japanese encodings.
    However, after the JIS standard was released people noticed
    something strange - several of the added characters had no obvious
    sources, and nobody could tell what they meant or how they should be
    pronounced. Nobody was sure where they came from. These are what
    came to be known as the ghost characters (幽霊文字).

  (Via [2]dampfkraft.com)

  Ohhh … I like this kind of mystery! Thx to [3]@InfoSecSherpa for the
  heads up!

  UPDATE: & thanks to [4]@polm23 for the original write up!
  Also on:

  [5]Twitter
    __________________________________________________________________

  My original entry is here: [6]A Spectre is Haunting Unicode ←. It
  posted Tue, 31 Jul 2018 14:21:59 +0000.
  Filed under: Japan, tech,

References

  1. https://www.dampfkraft.com/ghost-characters.html
  2. https://www.dampfkraft.com/ghost-characters.html
  3. https://twitter.com/InfoSecSherpa
  4. https://twitter.com/polm23
  5. https://twitter.com/TokyoGringo/status/1024299933086769152
  6. https://www.prjorgensen.com/?p=1368