Among others, Kenkyu shinsei (new law issued in the Kenkyu period) in 1191, Kangi shinsei (new law issued in the Kangi period) in 1231 and Bunei shinsei (new law issued in the Bunei period) in 1273 were specially called Sandai seifu (the three major seifu).
このうち、建久2年（1191年）の建久新制・寛喜3年（1231年）の寛喜新制・文永10年（1273年）の文永新制は、特に三代制符（さんだいせいふ）と呼ばれている。