This spark plug cover came with my JDM B16a (first gen). The previous owner imported it directly from Japan to his house around 2005. I've never put much thought into this unusual Esso sticker with Japanese writing until recently. I've googled until I eventually gave up and didn't find another single one like it anywhere. Not even a picture. I even tried a reverse image search with no luck.
So I'm here asking for help from anyone who might have some insight on whether it's original, where it came from, or if it's just some sticker that came from some Esso sparkplugs they bought for the car.

 

Simply looks like it was added to a car where those plugs were used. that's it.

 

Looks old oil change/ service sticker.