Funny coincidence; two or three weeks ago I was browsing some books for sale at a Japanese centre, just looking at titles. On the spine of one paperback I see 存在の耐えられない軽さ (Sonzai no taerarenai karusa). I'm like, existence's unbearable lightness ... what? ... Ohhhh! That must be Kundera, wow. Looked closer; yup.