Hsu Chia-yuan or Kyo Kagen (許家元; born 24 December 1997[1]) is a Taiwanese Go player who plays professionally in Japan.

[2][3] After graduating from elementary school, he moved to Japan in 2010 to study as an insei with Takabayashi Takuji 6 dan as his teacher.

This broke the record of 6 years 0 months set by Ida Atsushi in 2015 for being the fastest to go from becoming professional to winning a major title.

[10] Later that year, Hsu was the challenger for the 45th Tengen, and lost 3–2 to Iyama Yuta.

[12] In 2021, he won the 59th Judan, his second major title, in a 3–2 victory over Shibano Toramaru.