Kikkoman bottle, 1961. Hello Kitty launch, 1974. In a way they were contemporaries, and although quite far apart conceptually, I think at some level Ekuan-san would be OK with it. Especially given the patina of 40 or 50 years of history.
Would love to see/curate/host a gallery of Kikkoman bottle mash-ups a la Kidrobot Dunny.