I’m having trouble understanding pension in japan. I have been living in japan for about 5 months since 28th of July this year. I came under the engineering visa and work with a local japanese company. This Friday i got a mail from Japan Pension Service, green envelope, stating that i have 16,5k jpy outstanding for national pension (国民年金). This got me confused since afaik i already paid my pension (個性年金) by having it deducted through my salary every month. I also confirm it by looking to the wiki on this sub where it mention that my shakai hoken should also include the national pension contribution. I believe the reason behind this is because even though my shakai hoken should already covers my national pension, it is only registered by august 1st (the day i started working), which leaves me pension-less for the first 4 days (July 28-31) since i arrived in Japan. If this were true, is there any way for me to be exempted for this outstanding? In my defense i only came 4 days earlier in order to prep things before i begin working (unpack stuff, register address to local municipality, get to know with the local transportation, etc)
Any advice from someone with better knowledge or similar experience would be greatly appreciated.
by Alternative-Drawing6