The "Best wishes!" translation is to maintain consistency with other places where Ooishi is saying this. I think it makes sense to avoid the literal "Happy New Year" for this line. When I asked on the steam forum, a Japanese player was kind enough to explain that Ryukishi07 used to use "Happy New Year" as a greeting at his/her old workplace, and so added that quirk to Ooishi. I think it's a fun thing, but it just doesn't make sense to me for it to be in the English version (impossible to find this out in English afaik)
27 KiB
27 KiB