And not just because that set looks like a giant nipple.
In the episode "The Icarus Factor," the Enterprise's first officer, William Riker, has to deal with personal issues concerning his estranged father that he thinks can only be achieved by whaling on him with a stick. Hence Riker challenges his father to Anbo-jyutsu, a made-up Japanese-esque martial art played in an arena with the Japanese character for "star" written in the middle and the words "Ataru" and "Ramu" beside it. There is also a Japanese banner in the back that reads "Urusei Yatsura." I'd make a joke about how that translates to "tits and ass," but it wouldn't actually be a joke.
Together, all that Japanese writing forms a Voltron-like shout-out to the anime series Urusei Yatsura, which features a) the character for "star" in its name, b) two protagonists named Ataru and Ramu (aka Lum), and c) weird s**t like this: