In Japan, we call wooden tubs whose lids are removable ‘Oke’ (桶) and we use them for Miso, Shoyu making, Nuka and so on. Oke is obviously the word ‘Ki-Oke’s Oke, ‘Ki’ means wood. Oke is used to make Sake too.
‘Taru’ (樽) on the other hand, looks like a Wine barrel that does not have a removable lid on top and to store and transport liquid such as Sake or Shoyu. We call the one to store Sake ‘Sake-Daru’.
Taru (樽) is more suitable to store liquid for a long period of time than Oke (桶).
So if you can remove the lid and can see the whole bottom inside, it would most likely be Oke (桶).