Shukyū-ha (守旧派 or 守舊派, lit. "Old Guard") refers to the power and idea of existing traditional values or systems in opposition to any reform movement.
In Chinese history, when the Hundred Days' Reform movement broke out, those who supported it were referred to as , and those who opposed it were referred to as . In Korean history, those who opposed 開化派, who insisted on independence and modernization from the Qing Dynasty, were called .
Translation.
守旧 commonly translates to "conservative" or "reactionary". However, it doesn't have exactly the same meaning as 保守 (lit. "conservative") or 反動 (lit. "reactionary"); 守旧 focuses more on maintaining the stubbornly defending the status quo. 派 can be translated as "faction" or "group".
In Japanese politics.
In Chinese or Korean politics, 守旧 may mean "ultraconservative" depending on the context, but in Japan, "shukyū" or "Shukyū-ha" is not usually translated as "ultraconservative", as right-wing nationalists/conservatives are also used to criticize politicians who oppose the Article 9 of the Japanese Constitution.
"Shukyū hoshu".
In Japanese politics, there is also the term Shukyū hoshu (守旧保守), which has the opposite meaning to "Kaikaku hoshu" (改革保守, lit. "reformist conservative").
Junichiro Koizumi, the former prime minister (2001 – 2006), was called "kaikaku hoshu" because he pushed for neoliberal reforms, unlike "shukyū hoshu", which has a traditional bureaucratic nature.