Blind and the Beast: April takes the turtles to Murakami's restaurant specifically because he is blind and can't see that they aren't human. He later figures it out through his other senses, but is not afraid and is very grateful to them for saving his life.
Blowing a Raspberry: Mikey does this to one of the Purple Dragons during the battle in the fortune cookie factory.
Japanese Honorifics: The turtles call Mr. Murakami "Murakami-san". He calls Donnie "Turtle-san" at the end of the episode.
Jerkass Has a Point: Bradford said he's the reason Xever managed to defeat the turtles, and to be honest, he wasn't wrong. He took down Don and Mikey by himself, and double teamed Leo with Xever. Raph was the only turtle Xever defeated on his own. If you do the math, Bradford defeated two and a half turtles while Xever defeated one and a half.
Mythology Gag: Subverted. Murakami seems to be named after Jimmy Murakami of Murakami Wolf, the animation studio responsible for the 1987 series. In reality, Ciro Nieli named him after a friend of his, possibly Teen Titans collaborator Glen Murakami.
Offhand Backhand: Mikey does this in the fight with the Purple Dragons. Even while distracted by a bowl of noodles, he knocks a guy back and forth between him and Donnie without even looking or turning around.
Supreme Chef: Chef Murakami. Even being blind doesn't prevent him from cooking up "Pizza Gyoza" for the turtles.