Kasumi Hanazuki <kasumi@rollingapple.net>, a Rubyist and Software Engineer

• Diary (in Japanese)
• SNS/IM:
  • GitHub: hanazuki
  • Twitter: k_hanazuki
  • Keybase: hanazuki
  • Steam: hanazuki
• PGP public keys — also available on GitHub and Keybase:
  • 19B3 3A5C 4C43 D92E 2943 BB2D 598A 219B 2C58 FA41
• Affiliations:
  • KMC
  • ICPC Japan Alumni Group