This is "52 Hertz Whales" by Sonoko Machida. I read it once and have kept it on my bookshelf. An emotional novel that won the Booksellers Award (Honya Taisho) for first place. - Title: 52 Hertz Whales - Author: Sonoko Machida - Awards: Booksellers Award (Honya Taisho) - 1st Place - Year of Publication: 2021 Thank you for looking.