* CrossDressingVoices:
** Hikaru and Akira are both voiced by women in the original Japanese dub. (Not unusual since they're both young boys.)
** The Latin American Spanish dub did the same, except that, while Hikaru is voiced by a woman, Sai, an adult man, is also voice by a female voice actress too,[[note]]At least at the time; Ale Delint, Sai's [=VA=], was enduring hormonal therapy before changing his sex to male, and this was his first and very likely, last role as a male. See below the reason[[/note]] while Akira is voiced by a male instead.
* LateExportForYou: The animated adaptation didn't reach Latin America until 2023, a whopping ''twenty-three year'' wait from its original Japanese broadcasting.
* PortmanteauSeriesNickname: "Hikago".
* TheRedStapler: The series revived interest in Go among young people when it had previously been perceived more of a pastime for the elderly.
* SwanSong: In the Latin American Spanish dub, this was the final voice acting role Ale Delint (as Sai) did as a female voice actress and also his final role as a professional one, as he retired from voice acting in order to undergo to gender reassignment therapy during July of 2023.