@ageof , may I suggest that you first take a quick look at the instructions for the form 2555 --- 2022 Instructions for Form 2555 (irs.gov)
Generally the form is interested in is your foreign Tax home and so all the details you provide are towards that e.g. if you entered Japan on 08/01/2022 then your tax home for purposes of 2555 is Japan -- starting 08/02/22 -- first full day of residence.
If you have more questions/ doubts on this , please welcome to add to this thread and I will circle back and help.
pk
