Anna Sawai revealed how her own experience with an actual disaster better connected her to Cate's backstory. She was in Japan during the 2011 earthquake, explaining how her own trauma influenced the character. "The whole thing about her being traumatized, I've never had anything to that extent, but I was in Japan when the 2011 Tohoku earthquake hit and whenever I hear a buzzer, I'm always like, 'Oh my God is the same thing going to happen.' So I just related to her on a different level."
Apple TV+ announced in June 2022 that it has added Anna Sawai, Kiersey Clemons, Joe Tippett, Elisa Lasowski, and Ren Watabe to its cast lineup. In addition, Chris Black and Matt Fraction have come onboard as creators. The series will further explore Godzilla as well as his fellow Titans.
Paul Benjamin told Animation Magazine, "We had one airbag deck that we probably used on every episode from putting a bus on it to the rescue pod to a sand set." The airbag deck allowed whatever was on top of it to shake from side to side or front to back and created a lot of the movements during monster attack scenes. This behind-the-scenes video shows lead actor Anna Sawai jumping out of the shaking school bus while filming the flashback G-Day sequence where Godzilla destroys the Golden Gate Bridge. In an interview with Screen Rant, Sawai revealed that the G-Day sequence was the most difficult scene to shoot. She didn't yet know how to react to the famous tennis ball because it was early on in the filming process. Plus, it was wet and rainy, and Sawai was surrounded by children (her character is a teacher in the show), and she found it difficult to interact with them all at once. Being attacked by a giant monster in the middle of a famous landmark is no walk in the park!
Anders Holm's character, Bill, works for Monarch and is seen wearing a Kansas City Monarch's baseball hat.
In this production, Takehiro Hira and Anna Sawai play father and daughter. They are reunited in Shōgun (2024) but their characters are not related and Hira plays a political and military rival to Lord Toranaga who Sawai's character serves.