In Japanese, an address is written from the largest area to the smallest: prefecture, city, district and finally the block and house number. In Roman letters the order is reversed, following Western conventions.
7770006
〒777-0006
徳島県美馬市
穴吹町口山1-2-3
山田 太郎 様
Japanese-style address
Taro Yamada
1-2-3 Kuchiyama, Anabuki-cho
Mima-shi, Tokushima 777-0006
JAPAN
English-style address
1-2-3 is an example of the chōme, block and house number. Replace it and the name with the real ones.