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.
0210801
〒021-0801
岩手県一関市
桜街1-2-3
山田 太郎 様
Japanese-style address
Taro Yamada
1-2-3 Sakurakoji
Ichinoseki-shi, Iwate 021-0801
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.