Check the information <a href=http://dgraph.info/air/?itemid=414>here; the magnetic bearing of the ILS localizer course has changed. Starting from June 25, it changed from 79 degrees to 80 degrees. Is this phenomenon common? Is it caused by changes in magnetic variation?

I would appreciate expert advice.

Wakkanai Airport ILS-LOC 08 Magnetic Bearing Change
(1) ILS-LOC 08: 111.1MHz [IWK] CAT-I opr0830~1830
(2) ILS-LOC 08 BRG(MAG): 079 → 080
(3) Effective Date: 15/06/25