I did enter a house with a white door (the only white door that goemon was able to enter) and some dude said something like "how did you find my secret house" or something like it. I don't know if its the same kanbe you're talking about.
Here's another untranslated stuff. When goemon hits the lord of the 7th stage, it says "BAM", but there's another onomatopoeia sound that isn't translated.http://sharebee.com/e3b55444
Also, I don't know if I'm crazy or not, but on stage 7, there is a part where you come across a temple with a huge red balloon (?) thing and two exits on the right and left ( pic here http://www.geocities.co.jp/SiliconValley/5158/goe27.htm
). Well, when I started this stage and reached that area, my first instinct was to enter that temple and I did go in. But then I left to see what was on the other two exits and when I tried entering the temple again, it did nothing. As if there wasn't anything to enter to.
Am I crazy and I imagined I entered there or is that some sort of secret that I can't trigger anymore?