いついつまでも

expression

indefinitely; for a long time; forever

Emphatic form of いつまでも, stressing that something continues without end or for an extremely long time. Often used in wishes, promises, or complaints about something that never changes.

• あなたのことはいついつまでも忘わすれません。

  I will never forget you, no matter how much time passes.

• この幸しあわせがいついつまでも続つづきますように。

  May this happiness last forever.