Dayo's name is sometimes erroneously transliterated as "Daiyo," such as in the English subtitles for Ebirah, Horror of the Deep on The Criterion Collection's Godzilla: The Showa-Era Films, 1954–1975 Blu-ray box set. "Daiyo" is also used on the disc packaging for Sony Pictures Home Entertainment's 2005 DVD release of the film, although it's spelled correctly in that disc's English subtitle track.
Dayo was kidnapped by the Red Bamboo and taken to Letchi Island as a slave to create an Ebirah repelling fluid for them. Dayo escapes shortly after arriving on Letchi, and meets the other protagonists, who find shelter in a cave where they discover the dormant Godzilla. When the group decides to infiltrate the Red Bamboo's base, Dayo comes along. inside the base two of the protagonists are captured, leaving only Dayo, Yoshimura, and one other person free. It is then decided to wake up Godzilla using some copper wire Dayo found in the Red Bamboo base and an Infant Islander's sword as a channel. When Godzilla wakes up, one of the other protagonists named Ryota, and his brother Yata return to Letchi Island to aide the captive Infant Islanders. Shortly after Godzilla is spotted near the Red Bamboo base, they activate a nuclear bomb to destroy Godzilla. At this time Dayo and the rest of the Infant Islanders' prayers are answered and Mothra comes to safely remove Dayo, the Islanders, and the other protagonists from the doomed Letchi Island.
A section for Dayo from The Pictorial Book of Godzilla 2
- Actress Noriko Takahashi was originally cast as Dayo, but she fell ill with appendicitis during production and was replaced by Kumi Mizuno.
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