Kojiro Shiraishi (白石 康次郎, Shiraishi Kōjirō) is a Japanese sailor who holds the record as the youngest sailor ever to circumnavigate the globe in a 176-day continuous, single-handed, unassisted journey in 1994.

He was born in Tokyo and grew up in Kamakura.

In 2005, he participated in the Velux 5 Oceans Race in his boat, Spirit of Yukoh, and placed second, beating notable sailors such as Sir Robin Knox-Johnston and Mike Golding.

[1] He was the first Asian sailor to take part in the Vendée Globe in 2016, but was force to drop out from the race following a loss of the mast off Cape Town, South Africa.

[2][3] He returned for the 2020-2021 Vendee Globe where he became the first asian sailor to start and complete the race in a time of 94d 21h 32m 56s[4] although he suffered significant sail damage early on the race he persevered and finish the race.