Japanese company Tenga, which makes a line of masturbation toys by the same name, is dubbing July 21 as “Hand Job Day.” The reason is that “masturbation” in Japanese is “onanii” (オナニー), which is a pun on 07.21 (“o” for “zero”; “na” for “seven” or “nana” in Japanese; “ni” means “two” in Japanese; and here, they’re making a pun on the long vowel mark “ー” by saying it refers to “一” or “ichi,” which means “one.”) So, “Jerk Off Day” is probably more accurate.
The company has created a Power Rangers or Kamen Rider style “Masturbation Hero” called Tengaman.
The logo reads “Tengaman” (テンガマン) in Japanese, and above that, it reads, “Jii Senshi” (自慰戦士) or “Masturbation Warrior.”