Why did I find so many Saitama City and Saitama Prefectures after watching One Punch Superman and then watching the new January release? I still paid attention to them in the past...

Perhaps it was because the audience was attracted by the powerful strength of the protagonist Saitama when watching One Punch Superman, so many anime and manga characters similar to Saitama City or Saitama Prefecture appeared. These character settings were usually used to represent Saitama's powerful strength and indomitable spirit to motivate and inspire the audience. The existence of characters such as Saitama City or Saitama Prefecture in anime and manga may also be to better connect and pass on the original. By using Saitama's image and setting, the author could better attract and retain the audience while also bringing more topics and influence to the work. For whatever reason, after watching One Punch Man, the audience would find many characters similar to Saitama City or Saitama Prefecture. The existence of these characters was also an appreciation of the original work and recognition of the author's creativity.