It's a bit more nuanced than that… Fukinsei (asymmetry or irregularity) is considered one of the core principals of arts like bonsai or ikebana. Compare a Japanese zen garden to a perfectly symmetrical english-style hedge garden.

So while I would agree that there is high value placed on things being 'perfect', I would disagree that Japanese culture sees symmetry as the ultimate expression of perfection… I would say they see 'asymmetrical yet balanced' as perfection.