House numbers are usually of the form 1-2-3. Places with just two numbers are common, they haven't caught up with the "new" law from the 1962 yet.
Numbers are often written without suffixes, but in most places with three numbers the suffixes are 丁目-番-号. In one city - Wakasa in Fukui - the last two are reversed. I have never been able to find any mention of this at all, let alone why it would be the case.
Some cities are laid out in a clock pattern with slices named after animals of the Chinese Zodiac.
Neighborhoods are typically divided into blocks with numbers (or the number is omitted if there's just one block). But as addresses change over time, sometimes just one block goes away, so there are many places where block 1 no longer exists or there are gaps in the numbering.
On Yahoo Answers I once saw a person who was confused after their local post office adamantly told them one of their two or three numbers had a hyphen in it (so it was like 1-(2-3)) because it represented two joined lots, but that shouldn't be possible.
Mail is always complicated... I worked at a mail store in high school in the States and remember shipping some weird stuff.