The phrase comes from Japanese, where ichi byou means one second and keika refers to time passing, so the line functions as a literal spoken timestamp. Its exact original source is not widely documented, but the clip spread through anime edit communities and soundboards as a shorthand for stalled or exaggerated timing. It is often grouped with other timing jokes like anime time stop gags and to be continued cutoffs, where a serious delivery contrasts with almost nothing happening. That contrast keeps it in rotation for short form edits.