The cores of saisekijin in Hokkaido Prefecture are classified into the following types known as Yubetsu technique (technique in Yubetsu area): Types of Shirataki Remains, of the Satsukotsu Remains, of Togeshita Remains, of Rankoshi Remains, of Oshoroko Remains, of Horoka-gawa (or Horokazawa) Remains, of Shatekiyama Remains, of Momijiyama Remains, and so on.
北海道の細石刃核は、湧別技法として知られる白滝型・札骨（さつこつ）型・峠下（とうげした）型・蘭越（らんこし）型、忍路子（おしょろこ）型、幌加（ほろか）型、射的山型、紅葉山型などに類別される。