The shape of the end roll of the music video for “Workin’ Hard” is strange. The names of the staff are arranged in a radial pattern. This could have been designed after an old Japanese joint signature document called “Karakasa-Renpanjo”, which was used from approximately 1336 to 1868.   Video of Zu-san and Takeo’s response and explanation for “Workin’ Hard” I have arranged the video so that it starts with the section on the joint signature.     While I was watching Zu-san’s YouTube video on the musical perspective of “Workin’ Hard”, he said the following about the end roll:   This looks like a joint-signature document called “Karakasa-Renpanjo” that…