Play Famicom Games on your Super Famicom

So you’ve decided to buy a Japanese SNES (Super Famicom or SFC) either while on holidays or online (eBay, Yahoo Auctions, etc.) and you now want to play the even older classics from the Japanese range. I’ve read alot of reviews of the Retrobit which seems to be the most popular adapter for this sort of thing (Link here to Amazon page: Retro-Bit RetroPort NES to SNES Cartridge Adapter – Super NES). The problem is that I haven’t found a concrete answer about whether the Retrobit supports Famicom games on a SFC. The Famicom Solution That led me to purchase one...