In my youth, before I'd done professional work, I was rather self-righteous about swiping. Getting a taste of deadline pressure and the limits of one's abilities gave me a more nuanced outlook. These days swipe-spotting is more of a hobby. Some comic artists swiped a lot, some only occasionally, but it's safe to say that very few never used any kind of reference. What fascinates me about swiping is how certain swipes propagate over time. George Olesen, not a well-known artist, drew a cigar-chomping villain in an issue of The Hawk, not a well-known 1950s western comic (1954). That villain reappeared in a Mel Keefer issue of The Texan (1959), a Dick Giordano issue of Nukla (1966), and in another 60s adventure comic whose title I don't remember. A 1936 Terry in the Pirates panel, portraying Pat Ryan taking on two assailants at once, has reappeared frequently over the years courtesy of Everett Kinstler, Jim McLaughlin, Wallace Wood, Sal Trapani, and numerous anonymous artists. Alex Raymond is surely the most-swiped artist. Some Golden Age cartoonists built entire stories from Flash Gordon swipes. I've done my share of swiping, and I point out swipes for entertainment, not to judge the swiping artists.
Concerning Judomaster's costume: I've always liked both JM's and Tiger's costumes. They're bold, dramatic, and unique. I always interpreted the topknots as a nod to the samurai topknot. It didn't bother me back then but now I question the wisdom of JM&T basing their costumes on the Japanese Rising Sun and "Meatball" flags. Would unschooled Japanese soldiers take them for friends? Would unschooled Allied soldiers take them for enemies?