Shikitari (仕来り): custom handed down from the past. The Daijisen dictionary defines it as an old habit, a usage, a convention. Its examples are shikitari o mamoru, to keep to custom, and shikitari ni shibarareru, to be bound by custom.
Tōshū (踏襲): following in the steps. The business magazine DIME explains it as taking over precedents or policies and doing things the same way. It appears in the phrase zenrei tōshū, following precedent.