I felt Ojisan's pain when Sawae equated Nintendo to Sega...but then she mentioned [Love and Berry], which was a hybrid TCG/dress-up/rhythm, cheap coin-op game made by Sega; targeted towards little girls in the early 2000s. The collectible cards had a barcode on the side, which would be swiped on a reader in the middle of the machine. Each card was a dress-up component - hair, makeup, outfit, and shoes. Players are scored on their outfit coordination, after which they get to choose a stage - different settings come with different bgm. Rhythm game ensues. Players are then judged on their rhythmic performance. The gameplay loop is ridiculously simple. There's no competitive identity/backbone to the game. There's no in-game incentive to get better. All it was - was being able to flex to the other children that you could dress the titular characters up better and that you got a better score than everyone else.
Alongside Love and Berry was Mushiking, which was another hybrid game, based off the same chassis, targeted towards boys, but instead had beetle-pro-wrestling in the form of rock paper scissors. Compared to L&B, Mushiking was much more easily defined as competitive. Some might even say it predated p2w gacha mechanics before they were called that. There are beetle cards, and there are technique cards. Beetle cards are like your character select. Each beetle has different stats. Technique cards were the moves that your beetle would execute if you won at a round of digital RPS. Different moves have different damages, but certain moves have certain synergies/multipliers with certain beetles, which then forces a dichotomy between balanced builds and rock/paper/scissors-leaning builds, which then leads to a deeper level of strategy at the 6-year old competitive level.
Because of how cheap, accessible, and easy to grasp these games were, they were ubiquitous in both department stores as well as mom-and-pop corner stores across Japan in the early 2000s. In my opinion, it was a great way for children to enjoy the fun of inperson, adhoc arcade gaming without the fear of going to the more grown-up oriented arcades, which had (comparatively) scarier games like Maximum Tune, Initial D Arcade Stage (Vol. 3), Third Strike, KOF, beat/guitar/drummania, and the like.