SubDL has 41 subtitles for Kujira no Kora wa Sajou ni Utau (Children of the Whales) across 5 languages. New subtitles are added as the community uploads them.
Kujira no Kora wa Sajou ni Utau (Children of the Whales) subtitles are available in Arabic, English, Persian, Finnish, Vietnamese — 5 languages in total.
Open the language you want, pick the release that matches your video file, and click the download button. The file is a free .srt and no account is required.