The interesting thing about Japanese is that, unlike most other languages, it writes loanwords differently than native words: they're written in the katakana character set rather than kanji (Chinese characters) or hiragana. So "pan" is one of these, since it was borrowed from Portuguese.

This rule isn't absolute, though: coffee has a (rarely-used) kanji version, and tobacco ("tabako") is written in hiragana, as is tempura. Sometimes if the word is old enough, it gets treated as a native word.

My point is that it just seems like a pointless exception, it's not a coincidence with a separate etymology, it's not that oh actually they both trace their route way further back than Latin, it's just taken from a romance language, so 'really' the answer to the question is yes (on evidence so far).

Similarly tamatar in Hindi isn't like tomato (resp. tomate, etc.) because of some Proto-Indo-European root, it's just a devanagari approximation of the Portuguese.

I assume the intent in asking 'are they all romance languages' is 'do they all get it from Latin', to which the answer is certainly yes even if the language as a whole is mainly not.