Interesing list
In my view on have vs dont have
Japan: on the treshold, but denied - Agreed and its not even a technical challenge for Japan if they want Nukes
Argentina: No - Yes they had ambitious nuclear program after folkland war defeat and had uranium enrichment facilities.... later they converted to civilian nuclear program but they surely have a knowhow...
Brazil: Maybe - yes can easily build...
South Africa: Maybe but probably not - They even tested in south IOR... Google South Africa nuclear program... you can even find images of dismantled south african nukes...
Myanmar: No, but probably a goal - Had capacity long back from late 90s.... later due to economy and other issues this was put on hold... but cannot be denied...
Iran: on the treshold - Yes already have it....
Egypt: maybe, probably not. - Have but older designs and we do not know how many are functioning now....
Sweden: No, but have the know how - Yes
Israel: probably yes, but uncertain - 100% Yes....
Italy: No - have technology
Canada: No - have technology
Ukraine: No - They had 3K nukes readymade... handed over to UN after independence...