Koi has been enjoyed by the Japanese as a popular ornamental fish. While koi can be found in ponds and rivers all over Japan, the Nishikigoi, koi bred specifically for ornamental purposes, can at times be sold for over ten thousand dollars each.

Because the Koi is often seen swimming against river currents, it is considered a symbol of success in life.

The capacities listed show the amount of sencha (Japanese tea leaves) that can be stored in each canister.