A commemorative day established on this date because it was when the Toukaidou Yotsuya Kaidan was first performed, some 200 years ago.
The title of the play roughly translates to "Ghost Story of Yotsuya in Toukaidou", with Yotsuya being the name of a place in Shinjuku and Toukaidou being the name of a road during the Edo period.
The 26th of July is
Ghost Day!
Ah! I just can't deal with ghosts at all!The Yotsuya Kaidan is a kabuki play, but there is a legend that says that whenever it is performed, those involved end up getting injured...