Nipponinc--the place on Erde where none of the usual rules apply

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[EDITOR: Institute cryptographers have worked round the clock now for several days trying to make any sense of the above posted advertisement. It's not from any museum we know of in that surreal nation, and the word ZOOWAANAGANAGAI! (again, meaning totally unclear) is frequently chanted by Nipponinkers at feetball games when their side is losing (when their side does lose they set off fireworks and party all night, to the bewilderment of the winning team). Many centuries ago a Nipponinc message to a foreign ambassador--consisting of a skillfully executed watercolor of demons forming the ideogram for the word umbrella and a magnificently carved and joined wooden box containing a polished lump of coal--turned out to be a positive response to a pending trade negotiation proposal. Nipponinc delights the Erden world with its endless and colorful weirdness]