 Fukumoto stated that the original project did not have the main character's name as the series' title, and he named him so because he "did not want to make it so cool", and wanted a "dull" name.Assuming that people who will read "Kaiji" are not familiar with gambling manga, Fukumoto has stated that he created original gambling games in the series because they are easier to process than already existing games, allowing him to make simple and easy rules, adding as well that anything can become a gamble having an original game, and he can draw something surprising or interesting for the readers.To create a new game, Fukumoto first comes up with an idea and then a way to beat it, taking time to prepare tricks in order to win in a creative way, noting that persistence is key in the process.