Okka san Share definition Flag Mother in japanese. this is the formal form though. the most common way to say mom in japanese is "ka-san". Pronounced: O/Ka/san 1. Ohayou Gozaimasu Okka san! (Good morning mother!) Okka san by tater-totz 101 December 25, 2010 0 0 Get merch Get the Okka san mug. Buy Now — $32.95 See more merch
