Saki (咲) is the Japanese verb for "blossom" — from sakura (cherry blossom). Also written 沙希 (sand + hope). One of the most popular Japanese girls' names.
Saki is widely used in Japan.
Saki does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Saki reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.