Continuity mistake: The Shimizu goalkeeper reacts to Tsubasa's shot in two different poses. In the second he also lost his gloves. (00:19:15)
Continuity mistake: The first time we see Tsubasa's old friend Yayoi, she's surrounded by different people in the opening shots, and a different new batch later again when she reveals her name. (00:15:25 - 00:19:40)
Continuity mistake: While Roberto explains the strategy to his mom, Tsubasa is busy fending off 2 opponents. In the first shot though there are 4, two of them just disappeared and his teammate Urabe appears instead. (00:16:35)
Continuity mistake: Takeshi Sawada leaves everyone on the left wing in the dust. He beats an opponent that from the ground says "He's incredible." The guy behind him got himself a pair of spectacles in between shots. (00:13:40)
No Easy Way - S1-E12
Continuity mistake: In the second qualifying match, Tsubasa advances towards the keeper from the first match (blue jersey) and scores against a new one (light beige jersey). (00:11:15)
No Easy Way - S1-E12
Continuity mistake: When Tsubasa first scores, the keeper has no gloves, when Tsubasa scores a second time the gloves go from blue with a dark red back to yellow, and when he seals his hat-trick, the keeper has white gloves with the back blue like his jersey and then yellow. (00:10:00)
No Easy Way - S1-E12
Continuity mistake: In the first shot, from distance, of the bench, you can spot Wakabayashi sitting with a grim look on his face. A closer shot that follows shows nobody on the bench. (00:03:45)
The Football Is My Best Friend - S1-E4
Continuity mistake: Sanae beats with a stick the naysayer; the stick has a flag wrapped around it the first time, then the flag is gone. (00:15:00)
No Easy Way - S1-E12
Continuity mistake: In the shot when the Meiwa team is begging Hyuga to play with them, the M of their jersey is black and not yellow. (00:13:50)
Continuity mistake: Morisaki in this episode is wearing the number 12 jersey, but he started the previous episode with the number 1. (00:08:35)
Continuity mistake: When Kojiro Hyuga lands after a wuxia-like leap over the goal, Genzo is suddenly not wearing his gloves. (00:14:55)
The Football Is My Best Friend - S1-E4
Continuity mistake: During his night training with high schoolers, Genzo is randomly shown wearing his gloves or not. (00:10:45)
Kick-Off for the Future - S1-E3
Continuity mistake: The girls in front and behind Manabu Okawa wear clothes different in colors literally in every shot. (00:10:30)
Continuity mistake: When Genzo kicks the ball towards Tsubasa, the close-up shows the leg of someone wearing just thick white socks, while Genzo is wearing red pants that don't ride up that high. (00:21:40)
Continuity mistake: The inside of the truck Tsubasa and his mom ride in has stuff that change color/arrangement between shots. For instance, there's a beige box on top of the yellow and blue trunk next to Natsuko Ozora that is gone randomly in the aerial shots and when Yayoi is chasing them. (00:02:40)
Continuity mistake: Coach Mikami's sunglasses are pitch black during most scenes, but in his reaction shot to the news of Roberto Hongo's international retirement they are tan. (00:11:35)
Continuity mistake: When Roberto is looking at the team having a laugh with the still injured Ishizaki, there are 10 of them in the first shot with no keeper included and 10 including the keeper in the second. Both are wrong though, since Ryo has a substitute that is playing, so should be 11 players all along. Later in the episode when they run for the special training, it's 12 people, with Ishizaki still sidelined, but in the close-up of Roberto's foot you can see them run past, and it's 11 players. (00:07:05 - 00:10:10)
Continuity mistake: Ryo Ishizaki is wearing yellow boots at first, then blue boots when he's throwing balls to the training partners. (00:02:15)
Continuity mistake: Taro Misaki's flashback starts with him juggling the ball as he wears a pink shirt and black pants. The pants change to green in the next shot, but even more surprising, he gets blue hair. (00:09:45)
Continuity mistake: Mr. "OONN", the goalkeeper of Urabe's team, gets to wear a uniform completely different from his teammate's, but we saw him walk into the stadium exactly with the same tracksuit as the others 2 episodes earlier. And that he's wearing again in this same episode after the decisive goal. (00:07:05 - 00:13:45)