How do I write this address?

I know there was a post on this on this forum before but i can't figure out how to reply to that one so i'm starting a new one:

a friend of mine is teaching in japan for a year and i want to send her something to her apartment but she's not sure how to write the address. can anyone tell me if this is a valid address and if it is, what's the best way to write it?:
(this is how she gave it to me over instant messenger)

(my name)
230-0051
Yokohama-shi Kanagawa
tsurumichuo Tsurumi-ku X-X-X
japan

suggestions anyone?

English way:
Name
1-2-3 Address
City
Postal Code

Japanese way:
Postal Code
City
Address 1-2-3
Name

As explained here:
http://www.japan-guide.com/e/e2224.html

So, in your specific case, the usual way to write it in English would be:

Name
X-X-X tsurumichuo Tsurumi-ku
Yokohama-shi Kanagawa
230-0051
japan

(my name)
230-0051
Yokohama-shi Kanagawa
tsurumichuo Tsurumi-ku X-X-X
japan

It would be:

HER NAME
X-X-X Tsurumi-chuo Tsurmi-ku
Yokohama, Kanagawa
230-0051
JAPAN

That format is what I use, some people put the postal code after Kanagawa, that works to, it doesn't matter really.