Saku is a unisex name of Japanese origin, meaning "clear" or "pure". It consists of two kanji characters, 先 (saki) and 生 (ki), translating to 'firstborn'. Traditionally given to the eldest child in Japan, Saku has gained international recognition due to its unique sound and positive connotation. In Finland, it signifies 'waters' and is associated with the traditional Sauna ritual. Notable figures include Japanese football manager Saku Kohtake and musician Saku Kanenobu.